OODA. Observe, orient, decide, act. It's fighter pilot terminology. If you have a faster OODA loop in a dogfight, you live. The OODA loop of your decision-making is what differentiates your ability to succeed. You want to perform slightly crazy, super-fast maneuvers, again and again.

1. Observe your product, your users, and the environment, including the competition
2. Orient yourself to decide what it all means
3. Decide what to do
4. Act

via Chet Richards and Reid Hoffman