Leverage a principle from Peter Drucker: identify categorical decisions that eliminate entire classes of future choices. Instead of managing countless small decisions, make one sweeping rule (e.g., no new books, no public speaking for a year). This single choice removes thousands of subsequent decisions, creating massive mental space and clarity.

A founder's retrospective analysis often reveals that delayed decisions were the correct ones, and the only regret is not acting sooner. Recognizing this pattern—that you rarely regret moving too fast—can serve as a powerful heuristic to trust your gut and accelerate decision-making, as inaction is often the biggest risk.

The most common failure in problem-solving is rushing past defining ("State") and structuring the problem to get to the more gratifying "Solution" phase. A disciplined, multi-stage process forces a shift from instinctive (System 1) to deliberative (System 2) thinking, preventing premature and often flawed solutions.

Frame every small expense not by its current price, but by its potential future value if invested. A $50 haircut, if invested over decades, could be worth thousands. This mental model forces a long-term perspective on spending and reveals the high opportunity cost of frivolous purchases.