Peter Drucker says to know yourself:

The reason I like Drucker is because he doesn’t stop there or just bury you in self-help platitudes. He gives a definition:

What are you good at that consistently produces desired results?

It’s not necessarily what you enjoy or what a test says you have aptitude for, it’s the things you do that result in crossing the proverbial finish line.

These are your strengths. Other research I’ve posted shows they’re tightly tied to happinessand fulfilling work.

You need to know what your strengths are to make the right choices.