I was 17 once, was a good programmer, and learned how to play a bass guitar. ;-)

I have a slightly different twist on the same advice. Living well doesn't necessarily need to be the "cool" stuff such as described above. Nerdy things can be cool too. Learn math, or physics, or electronics. Studying those things was "living well" for me. It could expand your options for what you can do with programming, or for when you get bored with it.