How to Think in First Principles
Stop copying how everyone else does things.
🧠 Mental Models SKILL PACKS
Mental Models
Thinking tools that upgrade every decision you make.
9 lessons · 2 free
Mental Models
How to Use the 80/20 Rule on Everything
Most of your busywork does not move the needle.
How to Avoid Disaster with Inversion Thinking
It is much easier to avoid mistakes than to be brilliant.
How to Decide Faster with Occam's Razor
Complicated explanations are usually a defensive mask.
How to Stop Overthinking with Hanlon's Razor
People do not care enough to actively plot against you — and that's great news.
Second-Order Thinking: The "And Then What?" Question That Prevents Most Bad Decisions
The free pizza at the office meeting solves hunger (first order) and teaches everyone that meetings without pizza aren't worth attending (second order).
The Sunk Cost Trap: Why You Finish Bad Movies, Bad Projects, and Bad Relationships
You're 90 minutes into a terrible movie — so you watch the last 30, paying MORE of your evening to a film you already know is bad.
Opportunity Cost: The Price Tag Hidden on Everything You Do
Everything you do has a second price tag that never appears on the receipt: whatever you gave up to do it.
Circle of Competence: Know What You Actually Know (and Profit From the Edge)
Warren Buffett skipped the entire dot-com boom — ridiculed for years — because tech was outside what he understood deeply.