I just finished reading The Myths of Innovation by Scott Berkun. It’s a decent book, and probably required reading nowadays when innovation (whatever it means) is the coolest buzzword of all.
The moral of the book is: there’s no shortcut to creating the next Facebook or Google. You will need an idea, some skills, but most of all, lots and lots of hard work. Newton didn’t invent physics when he got hit by that apple (assuming it really happened), he worked on the problem for years. Unfortunately, after putting in all that hard work, you will still need a lot of luck in order to succeed (adoption, timing, press coverage, competition and so forth). Tough.