Have multiple mental models

To a man with a only a hammer, all problems will be nails: If we only have one tool in our arsenal thats what we use whether it is best for the job or not.

Also known as déformation professionnelle
surgeons want to solve all medical problems with an operation, militaries want to use military solutions first
the more mental models we have, the better
the more varied our mental models are, the better

"If your only tool is a hammer, all your problems will be nails,” said Mark Twain
Charlie Munger, Warren Buffett’s business partner, named the effect the “man with the hammer tendency” after Twain: “But that’s a perfectly disastrous way to think and a perfectly disastrous way to operate in the world. So you’ve got to have multiple models. And the models have to come from multiple disciplines—because all the wisdom of the world is not to be found in one little academic department.”