But. Have you actually watched this movie and applied some of its principles? This is an easy system of reframing experiences and adjusting your attitudes to focus not on worst-case scenarios or conventional wisdom (that most often makes life challenges seem much more insurmountable than they actually are).
Why should it be less sensible to focus attention on the outcome that you would like to have in any given situation, and take steps to get to that outcome?
Perhaps I'm especially sensitive to this because of my Catholic background, in which almost every event and action was an occasion to blame oneself and think about how one could have done better. This is a no-win situation, since, hypothetically, one can always have done better.
A smart alternative is to think about what you've learned from any situation, how that wisdom can be incorporated as you go forward in life, and how it can actually assist you in living the life of your dreams.
It's not over until it's over. So, if you're in a difficult life transition, take a look at The Secret, or watch it again with new eyes. It's a very practical toolkit to use in picking yourself up, dusting yourself off, and seeing the great value that you have for your world and for yourself. Give it a sincere try before you scoff. There's nothing to lose but the dark cloud : ).