Help, I'm in desperate need of a hobby. Anyone have any ideas?

I used to work two jobs and go to school. Now I got myself a big kid job and have 7 days off every two weeks. Now I have all sorts of extra time and have no idea what to do with myself. I have officially decided I need a hobby. I’m not very artistic and am trying to pay off school loans so don’t have tons of extra money, but I need to do something productive besides sitting on the couch watching tv. HELP!