Just saw a movie the other day called the "Law of Attraction". It is nice and is one of those power of positive thinking, manifest you destiny, you are what you think and believe kind of movies. I really believe in this kind of line of thought and highly reccomend other people to dig into it also. I personally like James Allen's book called "As a man thinketh" because it is one of the originals in this area but still a classic written over a hundred years ago and available for free on the internet at http://www.gutenberg.org/etext/4507 as well as many other places because its copyright has expired. It is only about fifteen to twenty pages and you could print it yourself and read it.
I also really like Wayne Dyer and the "Power of Intention". His work has also been instrumental in this field.
Lastly, I like Deepak Chopra's book "The Seven Spritual Laws of Success" the most. I thought it had the deepest understanding and the best metaphysical explaination of why positive thinking works.
Good luck and good day.