This one was a challenge for me. I loved it, but boy, it was grueling. Great ideas, new ways of thinking about everyday occurrences, and hilarious, snarky jabs at people whose ideas he dislikes.
The basic idea is that if you are going to benefit from a situation, there should be proportional risk. For example, if you lead your country into war with Iraq, there should be appropriate skin in the game. It also means that you do not listen to what people sa but rather to what they do.