I've never really been one to get into self-help books. My major dealt a lot with leadership, leadership training, etc., so I'm pretty well aquainted with the concepts.
I think they're really helpful for some people. There are actives and alums of my chapter that just gobble those things up. In fact, in our alum chapter, one gentleman who is in a leadership position told the rest of us that we were going to study this certain book about teamwork "Like the Bible". I promptly blew his assignment off
-- for some people, they're great. For others, they're pointless.