We all like to play games from time to time. Playing games is not only a way to spend time, but often is a good source of concepts related to various parts of life and science. Examples: importance of good resource management and parallel execution early in the game in resource-constrained RTS's (e.g. Warcraft); importance of good risk/reward weighting function in most card games.
What such concepts do you find the most valuable for your profession what games have taught you that?