Reversibility: Speed matters more than being right, as long as the mistake is cheap to fix.

A "One-Way Door" is a decision you can't undo (e.g., selling your company). These require deep analysis. A "Two-Way Door" is easily reversible (e.g., testing a new pricing tier, changing a headline). If a decision is a Two-Way Door, you must make it the moment you have 70% of the information.

What is one decision you’ve been putting off this week? Ask yourself: "If I make the wrong choice, can I undo it in 30 days?" If yes, make the call right now and move on.