Mental models, frameworks for thinking, simplify complex concepts & processes so you can reason through them. However, it takes discipline to use them.
Without mental models: 1. You go where your momentum takes you. 2. You use your instincts, shaped by past experiences & advice. Accomplished people share 3 traits: 1. Prefer to take action 2. Look to prove themselves wrong 3. Reassess priorities without fear of changing them
Half of the power of mental models is in optimizing systems; the other half is making better decisions. 1. Prioritizing: which path should you take first? 2. Allocating: how much attention, time & capital should you spend on this?