Mental models are how you simplify complexity, decide what to do, and understand how the world works. Here are the five most actionable ones you can use starting today.
1. First Principles Thinking
Break down complex problems into their fundamental components and build back up from there. Elon Musk famously used this to reduce rocket costs by 10x.
2. Inversion
Instead of thinking about how to achieve success, think about how to avoid failure. Charlie Munger’s favorite: “All I want to know is where I’m going to die, so I’ll never go there.”
3. The Map Is Not the Territory
Your model of reality is not reality itself. Always question your assumptions and update them with new evidence.
4. Circle of Competence
Know what you know — and more importantly, know what you don’t know. Staying within your circle and expanding it deliberately is how expertise compounds.
5. Occam’s Razor
Among competing hypotheses, the one with the fewest assumptions should be selected. Simpler explanations are usually correct.
Start applying these today and you will notice a meaningful improvement in the quality of your decisions within weeks.
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