NLP catches a lot of flak (some of it deserved perhaps) for being pseudo-scientific but it gets results and has a pretty rigorous (if nonscientific) basis.

I attended a seminar given by Dr. Bandler about fifteen years ago and volunteered for an on-stage demonstration (of hypnosis and some other techniques). I don't remember much, and my subjective sense was that I was up there for only a few moments, but I was told by a friend afterwards that it was several minutes. During that time, whatever he did, I was relieved of a severe depression that had ruined my life up to that point. Let me be clear: I had suffered from years of vicious depression that kept me from living a normal life. It went away and never came back.