Ask HN: Motivation Anyone?

Motivation's really important, isn't it? How do you get inspired/motivated? I didn't think I needed much, but recently I'm beginning to think otherwise. Frankly I've become less and less motivated through high school, my grades are slowly slipping. I think this isn't as much a personal problem as a generic one, most of the people in my school seem to be the same way. I had no problems till the 10th grade, then it just came about, I'm now in my senior year. I'm still interested in coding, and I've released an iphone app, but I just can't sit and hack anymore! Perhaps it's due to a need for a social life or some other unimportant thing like that, I've become very frayed by all this, any advice?