During the summer, when I didn't have anything to do - no school and no job - I went to the gym 2x a week. I got to a pretty good point after a while - ie. bench somewhat like 50 lbs, squat something like 100, 25-30 on various arm-press machines, etc. But now I have school and a job, and I never have any energy anyway, so I don't go. I'd like to go, but I can never get motivated. Advice?