There's this sense that you have where you are interested by things and not others. Upon listening to Robcast #61 with Neuroscientist Dr. Lynn Paul this idea kept coming up.
Follow what you are curious about.
Then ask yourself what would you be doing if you didn't need to make money?
Then figure out a way to do that thing and pay your bills. Because you were put here to do something, so figure out a way to do it.