A.C. Crispin, sci-fi fantasy writer, offers an interesting take on the kind of person who will likely "make it"; that is, become a published, working author. I thought it was a great post--these observations apply no matter what genre you write.
This blog, which A.C. Crispin writes with Victoria Strauss, is called Author Beware, and regularly lists scams and cons out there that target authors. Sadly so many people want to make money off your dreams, leaving you high and dry. Well worth checking out.