Well, Tony Robbins was there for me when I was in a slump of being extremely depressed for a couple of months. As several people mentioned, he is very good at being motivational, and I had been completely UN-motivated for a long time, was having trouble at school, trouble with my boyfriend, etc. I OD'ed on his tapes for a few days and I was able to pick myself up and get going again, so I'll always be grateful to him for that. Not grateful enough to shell out $10,000 for a weekend seminar though.
I tried reading Wayne Dyer's book
What Do We Really Want for our Children but it was too stream of consciousness for me. I really like his radio program on Hay House though. It's like Dr. Laura, but Dr. Dyer never insults people and you can really feel the love coming through as he gives his advice. If I'm not in a loving place, listening to Wayne can help shift me. I will have to try reading
Erroneous Zones, I'm sure it is at the library.