30 Prompts to Build Your “Second Brain”

Your brain is for having ideas, not holding them. Let AI handle the remembering.

📁 SORTING THE MESS

1. The “Brain Dump” Sorter

"I am going to paste a messy list of random thoughts, tasks, and ideas below. Categorize them into 4 buckets: 1. Projects (Active), 2. Areas (Ongoing responsibilities), 3. Resources (Reference info), 4. Archives (Completed/Inactive). List: [Paste Your Brain Dump]"

2. The “Tagging” System

"I use [App Name, e.g., Notion] to organize my life. Suggest a simple, high-level tagging system for my notes. I want to find things quickly without having too many tags. Give me 10 essential tags."

3. The “Book” Summarizer

"I just read [Book Title]. Identify the 3 core concepts from this book that are actionable. Turn them into a 'Cheat Sheet' note that I can save in my Second Brain for future reference."

4. The “Meeting Note” Extractor

"Process these raw meeting notes. Extract: 1. Action Items (Who/When), 2. Key Decisions Made, 3. Open Questions. Format it as a clean summary."

5. The “Idea” Expander

"I have a vague idea: '[Insert Idea]'. Ask me 5 questions to help me flesh this out into a concrete project plan. Wait for my answers."

6. The “Daily Log” Template

"Create a markdown template for a 'Daily Log'. It should include sections for: Top 3 Priorities, Gratefulness, Quick Notes, and 'Tomorrow's Plan'."

7. The “Email” Triage

"I have these 5 emails I need to reply to [Paste Subjects/Snippets]. Tell me which 2 are urgent and drafting a short, polite 'holding' reply for the non-urgent ones."

8. The “Project” Charter

"I want to start a new project: [Project Name]. Write a 1-page 'Project Charter' for my notes. Include: Goal, Success Metrics, Deadline, and First 5 Steps."

9. The “Shopping” Categorizer

"Here is a random list of things I need to buy. Group them by store section (Produce, Dairy, Hardware, etc.) so I can shop efficiently. List: [Paste Items]"

10. The “Resource” Vault

"I have found these 5 URLs useful [Paste Links]. Write a 1-sentence summary for each and suggest which 'Folder' in my Second Brain they belong to."

⚡ GETTING THINGS DONE

11. The “Eisenhower” Matrix

"Here are my tasks for today: [Paste Tasks]. Place them into the Eisenhower Matrix (Do, Decide, Delegate, Delete). Tell me the ONE task I must do first."

12. The “Weekly Review” Assistant

"Act as my accountability partner. Ask me 3 reflection questions about my week to help me review my progress and plan for next week. Focus on 'What went well' and 'What got stuck'."

13. The “Goal” Breakdown

"My goal is [Insert Goal] by the end of the year. Break this down into monthly milestones and weekly actionable steps."

14. The “2-Minute” Rule Finder

"Look at this to-do list. Identify tasks that likely take less than 2 minutes. I want to do them right now to clear the list. List: [Paste List]"

15. The “Deep Work” Scheduler

"I have 4 hours of free time today. I need to do [Task A] and [Task B]. Create a time-blocked schedule including 10-minute breaks using the Pomodoro technique."

16. The “Decision” Razor

"I am struggling to decide between [Option A] and [Option B]. Act as a logical consultant. List the Pros, Cons, and 'Opportunity Cost' of each. Then recommend one based on long-term value."

17. The “Batching” Expert

"I feel scattered. Here is my list of chores and work tasks. Group similar tasks together so I can 'Task Batch' them and save energy."

18. The “Saying No” Script

"I need to decline a meeting request because I need to focus on my work. Write a polite but firm email declining the invite without over-explaining."

19. The “Habit” Stacker

"I want to start [New Habit]. My current morning routine is [Describe Routine]. Where is the best place to 'stack' this new habit? Give me a specific 'When/Then' plan."

20. The “Energy” Audit

"I feel tired at 3 PM every day. Analyze my daily schedule [Paste Schedule] and suggest one change to improve my energy levels in the afternoon."

🚀 MAINTENANCE & GROWTH

21. The “Weekly Review” Checklist

"Generate a 10-step checklist for my Sunday 'Weekly Review'. It should ensure my inbox is empty, my calendar is prepped, and my to-do list is updated."

22. The “Skill” Gap Analysis

"I want to become a [Role/Goal]. Compare my current skills [List Skills] to what is required. Identify the top 3 skills I am missing and need to learn next."

23. The “Automation” Finder

"I do these tasks every day: [List Tasks]. Which of these can be automated using AI or Zapier? Explain how."

24. The “Archive” Rules

"My digital files are messy. Establish a set of 3 simple rules for when I should delete a file vs when I should archive it."

25. The “Project” Post-Mortem

"I just finished a project. Ask me 5 questions to help me analyze what went wrong and what went right, so I can improve next time."

26. The “Reading” List Pruner

"I have 50 articles saved to read later. I will never read them all. Give me criteria to delete 80% of them. What makes an article 'Must Read' vs 'Nice to Read'?"

27. The “Focus” Music

"Suggest 3 types of music or ambient noise playlists that are scientifically proven to help with deep focus and concentration. Explain why they work."

28. The “Smartphone” Detox

"I spend too much time on my phone. Suggest 3 physical changes I can make to my phone settings (e.g., grayscale) to make it less addictive."

29. The “Learning” Synthesizer

"I have notes from 3 different articles on [Topic]. Synthesize them into one single 'Master Note' that combines the best points from all three."

30. The “System” Reset

"I have fallen off the wagon and my system is chaos. Give me a 'Emergency Reset' plan: 3 steps I can take in the next hour to get back in control without feeling overwhelmed."

Organize Your Mind.

A Second Brain isn’t about hoarding info. It’s about freeing your mind to create. Start with Prompt #1 today.