I recently had the chance to view "The Secret," the DVD that's becoming a marketing phenomenon. It purports to reveal an ancient secret that has, until now, been shared with a select few - the wealthy and successful elite around the world. The video includes instruction and commentary from authors, "visonaries," professional philosophers and metaphysics experts...all presented with an air of mystery and intrigue, including brief re-enactments of ancient heroes rescuing "the secret" from oblivion (though we never actually are told what any of these historical re-enactments represent).
"The Secret," as it turns out, really much of a secret. It simply presents, in an entertaining format, some basic human truths that have been understood for eons - but for which most people lack the focus to follow effectively: "Do Unto Others as you would have them Do Unto You," "What comes around goes around," and so on. The program discusses having the right attitude (i.e. if you are negative, negative things will happen to you).
I've found that most popular self-help books are just creative reworkings of these same basic principles. Each book, or video in this case, packages the same message for varying audiences.
It all comes down to setting goals, focusing on your goals, and maintaining a positive attitude.
It's not a secret. It's a challenge.