I've read the book (after hearing a long conversation with the author on the Rich Roll Podcast), and it is excellent. It's applicable to more than sports, too. It's great for life in general... for any obstacle one might encounter, including the financial ones we all discuss here. The idea is that you not only overcome the obstacle, but you find a way to make it work for you so that you wouldn't have been able to accomplish your goal in the same way if the obstacle had never existed. It's hard to summarize, but it's really an excellent book and worth reading even if you don't have any interest in athletics. He talks about everyone from the ancient Romans to George Clooney.
I suppose if I had to apply it to MMM, I'd say that not the idea is not just working yourself to the bone to save for retirement (goal: accomplished), but finding creative ways to enjoy life more while doing away with wasted money and wasted time (goal: accomplished AND life improved by turning the obstacle into the path to the goal). If you're born rich, you don't have the same obstacle, and you might not ever truly appreciate the same things a Mustachian comes to appreciate along the way.
