I have seen this video and I must say that it has a positive outlook on bettering yourself. However, it requires a lot of energy to keep your mind focused on the positive thoughts. They also explain that wether your thoughts are positive or negative, both will be attrached to you. In a way, it almost sound like a daunting task of being aware of your subconcious thoughts. However it is a good excersize. Beside the secret, you might also want to try looking into a book called " A New Earth - Awakening to your life's purpose " by Eckhart Tolle, it has simliar positive concepts.

"Acceptance, Enjoyment, Enthusiasm. Whatever you cannot enjoy doing, you can at least accept that this is what you have to do. Be enthusiastic about things " - Eckhart Tolle.