What examples are there of jobs which can make use of high general intelligence, that at the same time don't require rare domain-specific skills?

I have some years of college left before I'll be a certified professional, and I'm good but not world-class awesome at a variety of things, yet judging by encounters with some well and truly employed people, I find myself wondering how come I'm either not employed or duped into working for free, while these doofuses have well-paying jobs. The answer tends to be, for lack of trying on my part, but it would be quite a nasty surprise if I do begin to try and it turns out that my most relied-upon quality turns out not to be worth much. So, better to ask: how much is intelligence worth for earning money, when not supplemented by the relevant pieces of paper or loads of experience?