"I think about decisions in three ways: hats, haircuts, and tattoos."

Most decisions are like hats. Try one and if you don’t like it, put it back and try another. The cost of a mistake is low, so move quickly and try a bunch of hats.

Some decisions are like haircuts. You can fix a bad one, but it won’t be quick and you might feel foolish for a while. That said, don't be scared of a bad haircut. Trying something new is usually a risk worth taking. If it doesn't work out, by this time next year you will have moved on and so will everyone else.

A few decisions are like tattoos. Once you make them, you have to live with them. Some mistakes are irreversible. Maybe you'll move on for a moment, but then you'll glance in the mirror and be reminded of that choice all over again. Even years later, the decision leaves a mark. When you're dealing with an irreversible choice, move slowly and think carefully.

Hat tip to Tim Ferriss, who once compared making decisions to choosing a sweater, which sent me down this line of thinking.