Build a Second Brain with Copilot

Organize work projects with PARA and query them instantly using Copilot Notebooks.

Introduction

30 Second Summary

You have meeting notes in one app, project documents in another, and key decisions buried somewhere in last week's email thread. When someone asks for a quick project update, you spend more time hunting through tabs than actually answering.

In this project, you will build a second brain for your work projects by organizing OneNote with the PARA method and powering it with Copilot Notebooks. You will load real project materials into one AI-powered workspace where Copilot can reason across everything to answer questions and generate deliverables on demand.

What You'll Build

Picture asking "What are the biggest risks on this project?" and getting a grounded answer in seconds, with citations pulling from your meeting notes, Word documents, and Excel data.

By the end of this project, you'll have:

A queryable knowledge base where you ask Copilot a question about your project and get cited answers pulling from your real documents, meeting notes, and spreadsheets in seconds.
Custom instructions that shape Copilot's responses to match your role, preferred format, and audience, so every answer is tailored to how you actually work.
Polished deliverables like interactive mind maps and podcast-style audio overviews generated directly from your curated project references.
An optional Secret Mission to push your skills further.

Are there any prerequisites?

This project requires a Microsoft 365 Copilot enterprise license (E3 + Copilot add-on, E5 + Copilot add-on, or E7). Features like Mind maps and Audio overviews are only available on enterprise plans.

You should also be familiar with OneNote basics like creating notebooks and adding pages.

Before We Start

Before we dive in, let's lock in what you're about to build and why it matters.

Set Up Your PARA Structure and Verify Copilot Access

You have committed to the work project that will anchor your Second Brain. Before you can build anything with AI, you need an organizational backbone.

Without a clear structure, your notebook will become a dumping ground of files that produces unfocused results. The PARA method solves this by sorting everything into four categories based on actionability.

In this step, get ready to:

Verify your access to Copilot Notebooks at m365.cloud.microsoft.
Create a PARA-organized OneNote notebook with four section groups.
Populate your first project section with real work content.

Verify Copilot Notebooks access

Your Microsoft 365 Copilot enterprise license includes Copilot Notebooks. Let's confirm the feature is available before building anything on top of it.

Open your browser and go to m365.cloud.microsoft.
Sign in with your Microsoft 365 account if prompted.
In the left navigation pane, select Notebooks.

The Notebooks dashboard opens. This confirms your enterprise Copilot license is active and Notebooks are available.

Don't see Notebooks in the left navigation?

Open the app launcher (the waffle menu icon at the top of the left navigation pane), then select Notebooks from the menu that appears.

If you still don't see the option, confirm with your IT administrator that your account has a Microsoft 365 Copilot license with a SharePoint or OneDrive service plan enabled.

Help me troubleshoot why Copilot Notebooks isn't showing up in my Microsoft 365 app.

Create your PARA structure in OneNote

PARA organizes everything by how actionable it is, not by topic. You will create four section groups inside a single OneNote notebook that act as your top-level filing system.

Press Cmd+Space (macOS) or the Windows key (Windows) to open your search bar.
Type OneNote and press Enter to open it.
Click File > New to create a new notebook.
Name the notebook Second Brain and choose OneDrive as the storage location so it syncs to the cloud.

Your new notebook opens with one default section. Now you will turn it into a PARA structure by adding four section groups.

Right-click the existing section tab at the top of the notebook and choose New Section Group.
Name the section group Projects and press Enter.
Click the green arrow icon at the far left of the section tabs to return to the top level.
Repeat the right-click process to create three more section groups: Areas, Resources, and Archives.

You should now see four section groups listed in your notebook: Projects, Areas, Resources, and Archives.

What does each PARA category mean?

Projects: active, time-bound work efforts with specific outcomes (e.g., "Q3 Product Launch," "Office Migration").
Areas: ongoing responsibilities you manage over time (e.g., "Team Management," "Budget Oversight," "Vendor Relations").
Resources: reference material and topics useful across projects (e.g., "Meeting Templates," "Industry Research," "Company Policies").
Archives: completed or inactive items moved from the other three categories.

Why PARA over other organization methods?

PARA is tool-agnostic and simple. It has only four categories, so there is no decision fatigue about where something belongs.

It organizes by actionability rather than by topic, which means your most important, active work always floats to the top. Other approaches like Zettelkasten focus on linking atomic notes, which does not leverage Copilot Notebooks' file-reference model.

Don't see the section groups?

Make sure you chose New Section Group (not New Section) from the right-click menu. Section groups have a folder-like icon and hold sections inside them. Regular sections have a colored tab.

If you accidentally created sections instead of section groups, right-click each one, select Delete, and try again with New Section Group.

Help me set up section groups in OneNote for my PARA structure.

Populate your first project section

Copilot needs real content to reason over meaningfully. Empty pages will not give it enough context to surface useful insights in the next steps.

Click the Projects section group to open it.
Right-click inside the section area and select New Section.
Name the section after the specific work project you chose in Step 0.
Inside this section, create at least 2-3 pages of real content by clicking Add Page at the top of the page list.

What kind of content should I add?

Paste in meeting notes from recent project meetings. Jot down key decisions that have been made and who made them. Copy over project goals, milestones, or timelines.

This does not need to be exhaustive. You need enough real content for Copilot to reason over meaningfully when you create your Copilot Notebook in the next step.

You should see your project section with multiple titled pages of content visible in the page list on the right.

Before you move on, take a moment to confirm your full setup. You should have the Notebooks dashboard accessible at m365.cloud.microsoft, and your OneNote notebook should show four section groups (Projects, Areas, Resources, Archives) with at least one project section populated with notes.

Your organizational backbone is in place. Next up, you will create your first Copilot Notebook and load it with project references so Copilot can start reasoning across your content.

Create Your First Copilot Notebook and Add Project References

Your second brain has a solid foundation. The PARA structure in OneNote gives every piece of project knowledge a clear home based on how actionable it is.

Right now, though, your notebook is a filing system. You cannot ask it a question and get an answer back. In this step, you will create a Copilot Notebook and load it with your project references, turning those organized files into a knowledge base you can query.

In this step, get ready to:

Create a Copilot Notebook and populate it with real project references.
Ask Copilot questions about your project and receive grounded, cited answers from your references.

Create a new Copilot Notebook

Your PARA-organized OneNote notebook stores your project knowledge, but it cannot answer questions or surface patterns across files. A Copilot Notebook adds an AI layer on top of your curated references so you can query them conversationally.

Return to the Microsoft 365 Copilot app at m365.cloud.microsoft.
In the left navigation, select Notebooks to expand the list, then select All notebooks.
Select New notebook.
Enter a name for your notebook based on your work project (e.g., Q3 Product Launch Brain).

The notebook creation screen shows a section labelled Add content to References. Copilot may suggest files it thinks are relevant to your notebook name.

You can also add references manually using several methods:

Search: type the name of a specific file in the search bar.
Filter: toggle between All, Files, Meetings, Emails, and Sites to narrow the suggested list.
Upload: add files from your local machine.
OneDrive: browse and select files from your OneDrive.
Drag and drop: drop files directly into the references area.

Add at least 5-7 references from your real project. Include a mix of file types: Word documents (.docx), PowerPoint decks (.pptx), Excel spreadsheets (.xlsx), PDFs (.pdf), and the OneNote pages you created in Step 1.
Select Create to finalize your notebook.

Which file types does Copilot Notebooks support?

Copilot Notebooks supports .docx, .pptx, .xlsx, .pdf, .loop, .page, .txt, .rtf, and OneNote pages. Files must be stored in your organization's OneDrive or SharePoint for Copilot to access them.

Your notebook opens in a three-column layout. You should see your references listed in the left column, Copilot Pages in the middle, and Copilot chat on the right.

What is the three-column layout?

References (left) holds all the source documents Copilot can reason over. Copilot Pages (middle) is where AI-generated content like summaries and drafts appear. Copilot chat (right) is where you ask questions and get grounded answers.

This layout keeps your sources, outputs, and conversation visible at the same time so you can trace every answer back to its origin.

Confirm your references appear in the References column on the left. Each reference should show a file name and type icon.

Can't find a file when searching?

Make sure the file is stored in your organization's OneDrive or SharePoint. Copilot Notebooks can only access files within your organization.
Try using the Filter toggle to narrow results to Files or Sites.
If a file is on your local machine, use Upload or Drag and drop instead of Search.

Still having trouble adding references?

Ask your first questions

With your references loaded, you can now ask Copilot questions about your project. Copilot reasons across all of your curated files and returns answers with citations pointing back to the specific source documents.

Locate the Copilot chat pane in the right column of the three-column layout.

Before you type your first question, think about what you expect to see. Will Copilot pull specific details from your documents, or give a broad summary?

Type a question about your project into the chat pane and press Enter. Try one of these prompts:

Copilot returns an answer grounded only in the references you added, with clickable citations that trace back to the source document.

What does grounded mean?

Copilot only uses the references you added to this notebook. It does not pull from your entire OneDrive, email, Teams chats, or the web.

Every claim in the response is traceable to a specific source document. Click a citation to jump straight to the referenced file.

Ask at least two more questions about different aspects of your project (decisions, risks, timelines, or action items).
Read through the responses carefully. Pay attention to the tone, format, and level of detail.

The answers pull real data from your files. But notice that the tone and format are broad and generic. The responses do not reflect your specific role, your audience, or how you prefer information structured.

Why do the responses feel generic?

Copilot does not yet know anything about you. It treats your notebook like any collection of documents and gives general-purpose summaries. It does not know whether you are a project manager who wants action-oriented bullet points or an executive who wants a three-sentence summary.

This is exactly the gap you will close in the next step by setting custom instructions.

Your Copilot Notebook is live and answering questions from your project files. The answers are grounded and accurate, but they could be sharper. In the next step, you will tailor Copilot with custom instructions so every response matches your role, your audience, and your preferred format.

Tailor Your Second Brain with Custom Instructions

In Step 2, you loaded your Copilot Notebook with real project references and asked your first questions. Copilot returned grounded answers with citations pulled directly from your documents. That is a solid start.

However, you probably noticed the responses feel generic. Copilot does not know whether you are a project manager who needs action-oriented bullet points or a team lead who wants decisions highlighted with owners. Custom instructions fix this by telling Copilot how to behave inside this specific notebook.

In this step, get ready to:

Set custom instructions that define your role, preferred format, audience, and prioritization rules.
Re-ask previous questions and compare the improved responses.
Iteratively refine your instructions based on output quality.

Set custom instructions for your notebook

Right now, Copilot treats every question like a blank-slate query against a pile of documents. It has no context about who you are, how you like information structured, or who your audience is.

Return to your Copilot Notebook in the Microsoft 365 Copilot app at m365.cloud.microsoft.
In the upper-right corner, click the More options (...) button.
Select Instructions.

An instructions dialog opens where you can tell Copilot how to respond inside this notebook.

Write instructions that cover four areas. Use your own role and context, but here is an example to guide you:

Your role (e.g., "I am a project manager leading a cross-functional team").
Your preferred format (e.g., "Always use bullet points. Lead with decisions, then action items with owners and deadlines, then open risks").
Your audience (e.g., "Assume I will share outputs with senior stakeholders who want concise, data-backed summaries").
What to prioritize (e.g., "Prioritize recent information over older references. Flag conflicting information across documents").

Click Save to apply your instructions.

What do custom instructions do?

Custom instructions act as persistent guidelines for Copilot inside this specific notebook. Every time you ask a question, Copilot uses these instructions to shape its response format, tone, and focus areas.

Different notebooks can have different instructions. Your project notebook might prioritize action items and deadlines, while a research notebook might prioritize source citations and contrasting viewpoints.

Test the difference

Your instructions are saved. Now it is time to see whether they actually change how Copilot responds.

In the Copilot chat pane (the right column), ask the same question you asked in Step 2. For example:

"Summarize the main decisions and action items from my meeting notes"
"What are the key themes across all my references?"

Before you read the response, think about what you expect to be different. Do you expect bullet points instead of paragraphs? Decisions listed first? A more concise tone?

Read Copilot's response. It should now match your preferred format, focusing on the aspects you specified in your instructions.

Try a few more prompts to see the instructions in action:

"Draft a one-paragraph project status update for my manager"
"What are the three biggest risks to this project based on my references?"
"Compare what was discussed in the two most recent meeting notes"

What should I see?

Compare the new responses to what you saw in Step 2. The structure should look noticeably different. If you asked for bullet points, Copilot should respond in bullets. If you asked for decisions first, they should appear at the top of the response.

The tone and focus should also shift. Responses aimed at senior stakeholders will be more concise and data-backed than the broad summaries you received earlier.

Responses still look the same?

Double-check that you clicked Save after entering your instructions. Unsaved instructions are not applied.

If your instructions are saved but Copilot seems to ignore them, try restating the key instruction directly in your prompt (e.g., "Using bullet points, summarize the main decisions"). This reinforces the instruction for that specific response.

Help me figure out why my custom instructions are not changing Copilot's responses.

Refine your instructions

Getting custom instructions right is an iterative process. Your first version is a starting point, not a final draft.

Review the outputs you just received and identify what needs adjustment.
If Copilot is too verbose, open your instructions again by clicking More options (...) and selecting Instructions. Add a line like "Keep responses under 200 words."
If Copilot is missing context, add a line like "Always reference the source document name when citing information."
Click Save after each update.

Test your updated instructions by asking the same question again and comparing the new response.
Repeat this adjust-and-test cycle until the outputs match what you need for your role and audience.

Start simple, then add specifics

Begin with 2-3 clear instructions and layer on more as you discover what Copilot needs to hear. Overloading instructions from the start can make it harder to tell which ones are driving the output.

Before moving on, ask Copilot one final question using a prompt you would actually use in your day-to-day work.

Does the response match your preferred format, tone, and focus areas? If so, your custom instructions are working.

Your second brain now speaks your language. In the next step, you will put it to work by generating polished deliverables like mind maps, audio overviews, and draft documents directly from your curated references.

Generate Deliverables from Your Second Brain

Your custom instructions are dialed in, and your Copilot Notebook now responds with the format and focus your role demands. That queryable knowledge base is about to become a deliverable machine.

A second brain that only answers questions is useful but limited. In this step, you will generate visual, audio, and written deliverables directly from your curated project references.

In this step, get ready to:

Generate an interactive mind map of the themes and relationships across your project references.
Create a podcast-style audio overview that summarizes your notebook content.
Draft a polished work deliverable grounded in your curated references and custom instructions.

Generate a mind map

Copilot Notebooks can transform your references into visual artifacts that reveal connections you might miss when reading documents one at a time. A mind map is one of the most powerful options, showing how key themes and decisions link across all your project materials.

In your Copilot Notebook, select Quick create in the left pane.
Select Mind map.

Copilot analyzes your references and generates an interactive visual map. You should see nodes representing key topics, themes, and relationships from your project content.

Click on individual nodes to see a summary for each topic.
In the Copilot chat pane on the right, type a follow-up question about a specific node, such as "Tell me more about the budget concerns node."

Copilot responds with a grounded answer drawn from your references, not generic knowledge. The mind map becomes an interactive starting point for deeper exploration.

What does the mind map show?

The mind map pulls themes from all your references and shows how they connect. Each node represents a topic Copilot identified across your documents, meeting notes, and data.

Because the map is grounded in your curated references, it reflects your actual project landscape. It is not a generic brainstorm.

Mind map not appearing?

Confirm you have at least one reference added to your notebook. Copilot needs content to analyze before it can generate a map.
Mind maps are available in the Microsoft 365 Copilot app on Windows and Web. If you are using a different platform, switch to the web version at m365.cloud.microsoft.
Why can't I see the mind map option in Quick create?

Create an audio overview

The audio overview turns your notebook into a podcast-style summary you can listen to while walking between meetings, commuting, or multitasking.

Select Quick create in the left pane.
Select Audio overview.
Listen to at least the first 30 seconds of the generated audio.

You should hear a conversational narrative that weaves together information from multiple documents into a single flowing summary. Notice how it synthesizes details across your references rather than reading them back one at a time.

How does the audio overview work?

Copilot reads across all your references and creates a spoken summary that covers the key points in a conversational tone. It currently supports English, Spanish, Japanese, French, German, Portuguese, Italian, and Chinese.

This is especially useful for catching up on project context when you cannot sit at a screen. The summary updates every time you regenerate it, so it stays in sync with your latest references.

Generate a draft document

Mind maps and audio overviews help you understand your project. Drafting a deliverable puts your second brain to work producing something you can share with your team and stakeholders.

In the Copilot chat pane on the right side of your notebook, type a prompt to draft a real work deliverable. Try one of these:

"Draft a project status report covering progress, risks, and next steps based on my references"
"Create an executive summary of this project for a leadership audience"
"Draft an agenda for next week's project sync meeting based on outstanding action items"

Before you submit your prompt, pause and predict. What format do you expect the output to take, given the custom instructions you set earlier? What specific details from your references should it surface?

Submit the prompt and review Copilot's response.

The draft should follow your custom instructions. If you specified bullet points leading with decisions, you should see that structure. If you told Copilot to prioritize recent information, the most current references should feature prominently.

Check the citations in the response. Each claim should point back to a specific reference you added, confirming the output is grounded in your actual project materials.

Why is this different from regular Copilot?

Regular Copilot chat generates responses from general training data and whatever context it can find across your Microsoft 365 environment. Your Copilot Notebook is scoped. It reasons only over the references you deliberately added.

Combined with your custom instructions, this means the draft pulls from your actual meeting notes, project documents, and data. The result is ready for light editing, not writing from scratch.

Output feels generic or off-format?

Check that your custom instructions are still set. Select Instructions and verify your formatting and focus preferences are saved.
Try a more specific prompt that names a particular document or meeting from your references. Specific prompts produce more grounded results than broad ones.
If the output ignores your format preferences, add an explicit format reminder at the end of your prompt, such as "Use bullet points and lead with decisions."
Why isn't Copilot following my custom instructions?

Secret mission

Share Your Second Brain with Your Team

Your second brain works for you. But what if your whole team could tap into the same curated knowledge base? In this mission, you will share your Copilot Notebook with teammates and connect a live SharePoint folder so the notebook stays in sync as documents are updated.

Clean Up Your Resources

Decide whether to keep your resources running, pause them to come back later, or delete them entirely. This project runs entirely within your Microsoft 365 environment, so there are no ongoing costs beyond your existing enterprise license.

Resources you used:

Your Copilot Notebook (stored in a personal SharePoint Embedded container).
Your OneNote "Second Brain" notebook (stored on OneDrive).
Sharing permissions granted to team members or Microsoft 365 Groups.

Keep everything running

No action needed. Choose this if you are still actively building your second brain and want to keep adding references, refining custom instructions, and generating deliverables.

Your Copilot Notebook stays accessible at m365.cloud.microsoft under Notebooks in the left navigation.
Your OneNote "Second Brain" notebook remains available in OneNote and syncs automatically.
Any team members you shared the Copilot Notebook with retain access.
The linked SharePoint folder continues to supply live references to your notebook.

Pause - I'll come back to this later

Revoke sharing access to keep your notebook private while you are away. Your content and references stay intact for when you return.

Open your Copilot Notebook at m365.cloud.microsoft.
Remove sharing permissions by selecting Share, then Manage Access, and removing each person or group.
Your Copilot Notebook, OneNote notebook, references, and custom instructions all remain saved.
When you are ready to return, re-share the notebook and pick up where you left off.

Delete - I don't want to use this again

Remove all project resources permanently. Make sure you have saved any content you want to keep before proceeding.

Deletion is permanent

Deleting a Copilot Notebook is currently permanent and cannot be undone. Notebook recovery via a recycle bin is in development but not yet available. Double-check that you have exported or copied any content you need before deleting.

Delete your Copilot Notebook:
Delete your OneNote "Second Brain" notebook:
If you shared the notebook with others, let them know before deleting so they do not lose access to any content they depend on.

Nice Work!

Nice work! You just built a fully functional second brain for your work projects, powered by Copilot Notebooks and organized with the PARA method.

You've learned how to:

Organize your work knowledge using the PARA method in OneNote, creating a clear structure of Projects, Areas, Resources, and Archives that separates active work from reference material.
Create a Copilot Notebook loaded with real project references and custom instructions, turning scattered files into a queryable knowledge base that responds in your preferred format with grounded, cited answers.
Generate polished deliverables like mind maps, audio overviews, and draft documents directly from your curated second brain content in seconds.
Secret Mission: Complete an optional challenge to push your second brain skills even further.

Ready to quiz yourself?