Very useful thread, however, many people decide to work hard, and not smart; however, I'm the opposite.
My GPA is okay, but that's all I have at the moment, as I'm only a sophomore.
What I'm trying to get at though is the fact that high school really doesn't mean that much to me. Right now, I'll be able to graduate early (right out of my junior year) and I think I'm going to. That's besides the point, though.
After I graduate, I'll be able to go to community college at the age of 16 and have my AA at 18. I'll get my bachelors, masters, etc. at any college I want (if I do well in community college, which I'm positive I will as I have most of the hard classes done already and will only need core classes). At that moment, my high school transcripts aren't trashed, however they don't mean much anymore when applying to another college/university.
So that's just me, and my only tip is to work smart–not hard.