Bo Schembechler, head coach at the University of Michigan from 1969 to 1989, has a label on leading teams that I love. He calls it Kick them when they're up. It is pretty self-explanatory. Basically, when a team is performing well, find the little things to improve versus kicking back and being self-congratulatory.
It's kaizen, those constant and never-ending improvements. It reminds me of the concept of Playing To Win versus Playing Not To Lose. That and Don Henley's song, Dirty Laundry.