Was listening to an interview of a co-author on the liberal bastion, NPR, about his book on willpower. Basically he was saying that the research they've been doing in this area has revealed some interesting things.
Essentially willpower isn't just something psychological, it has a physical component that is powered, by all things, glucose. In a given day, you have a finite store of willpower. But like a muscle, it can be trained to become stronger. The people who are best at self-control are the ones that go on the offensive and remove the temptations from their lives—mainly because they don't have to use up their stores of self control.
He talked about other things like 2 most reliable indicators of success are 1) Intelligence and 2) Self control.
Interesting concepts. What say ye, ES? Valid science? Or more pop psychology drivel?