Stories that involve good advice tend to get re-told, and the ones with real value pop up again and again. One of my favorites is the story of the legendary admiral who has a lock-box in his stateroom. Every day before he takes the bridge, he opens the lock-box, takes out a small piece of paper, reads it and puts it back. Over the years, this quirk is noticed by many people, and there’s lots of speculation about what’s on the paper: an inspirational quote, a personal sentiment or some gritty piece of military advice? When the admiral dies,...