Pitch Anything by Oren Klaff. - Josh Kaufman

Many things aren't fun until you're good at them . Every skill has what I call a frustration barrier, a period of time in which you're horribly unskilled and you're painfully aware of that fact.

I think it’s undeniably true that the human brain works in models. The trick is to have your brain work better than the other person’s brain because it understands the most fundamental models — the ones that do the most work. — CHARLES T. MUNGER,

Understanding your Locus of Control is being able to separate what you can control (or strongly influence) from what you can't. Trying to control things that aren't under your control is a recipe for eternal frustration