Optimize for your desired lifestyle, not your desired title. - James Clear

Life is too short to not be pursuing the best opportunity you know of.

Repetition unlocks value.

The value of your first workout increases the more you exercise.

The value of your first article increases the more you write.

The value of your first conversation increases the longer you stay in the relationship.

Day One continues to compound.

A practical definition of opportunity cost:

If you spend too much time working on good things, then you don't have much time left to work on great things.

Understanding opportunity cost means eliminating good uses of time. And that's what makes it hard.