A "mental model" is a way to think about the world. The world is infinitely complex, so the aim of any good model is to provide a lens through which you can simplify, evaluate, and make decisions as you walk through life. The Winner's Game vs. Loser's Game is a mental model with powerful applications for your career, business, investing, and life. A Winner's Game is won through incredible shots. A Loser's Game is won through avoiding unforced errors. Most games of life are Loser's Games. Two lessons to apply: (1) Avoid the Complexity Trap and (2) Embrace Self-Awareness.