From my humble observations in life,
Success comes mostly from having a good work ethic early in life.
Having health, looks with a little luck thrown in never hurts.
Things most people have at least a little control over like not being overweight, not being into drugs etc.. help a lot too.
I know a few individuals who never went to college and have done extremely well for themselves, I know college grads driving trucks for a living and a few on welfare. College is not the end all be all it is billed as well.