How to Build Your PM Second Brain with ChatGPT
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Lenny Rachitsky

How to Build Your PM Second Brain with ChatGPT

Lenny Rachitsky•Dec 16, 2025

AI Summary

In this episode, Amir Klein from monday.com walks listeners through a practical system for creating a PM "second brain" using ChatGPT, emphasizing that AI should amplify rather than replace a product manager's work. He explains how to define a clear AI personality, ingest scattered context from tools like Notion, Slack, and Figma, and then leverage the model to draft sign‑up forms, prototype ideas, and tailor communications. Klein also shares a simple feedback loop to keep the AI assistant up‑to‑date and illustrates three end‑to‑end use cases that demonstrate the brain’s ability to reduce mental load and accelerate decision‑making. The conversation highlights the importance of contextual awareness and continuous refinement for an effective personal AI copilot.

Episode Description

Use AI to amplify your craft, not replace it

Show Notes

How to build your PM second brain with ChatGPT

Use AI to amplify your craft, not replace it

Lenny Rachitsky – Dec 16, 2025

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In this episode, Amir Klein from monday.com shares a practical, battle‑tested system for building a PM “second brain”. Amir explains exactly how to set up a ChatGPT project with a clear personality, feed it the messy context scattered across your tools, and then put it to work—drafting sign‑up forms, spinning up prototypes, and tailoring communications for every audience.

Listen now: YouTube | Apple Podcasts | Spotify

In this episode, you’ll learn:

  • Why context is the PM’s heaviest mental load

  • How to build a second brain that challenges you and mirrors your taste

  • The wealth of information your second brain can absorb

  • A simple loop to keep your second brain fresh

  • Three end‑to‑end use‑case examples

References

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