i used to just do general studies since i didn't know what i wanted to be... then i settled on business because it seemed like the 'the thing to do'. after a couple years of that i got a good job in business but after two years i realized that i hated it. from that point on, i looked less at how many jobs are available or whatever, i looked at what my interests were and what i could do as a career with what degree.
now i'm 23 and i've pretty much started school over... and my major is zoology. i don't know if this helps you at all, but i figure if nothing else, misery loves company
i guess basically, look at what careers are available and try to envision what would make you happy. you can always study whatever you want in your own time...