I wish I would have taken HGH sooner. (human growth hormones). My growth was stunted, I was in the 15% percentile of the population for how small I was.
Started freshman year but it didn't start working until junior year. To this day I have trouble out growing the name "little ricky." Even though I'm 6'2, 170 pounds, they still call me little ricky, wtf?
Sucks too when you are friends with a hot girl and doesn't take you seriously because she still considers you that little kid.... bah
-edit-
However, I'll always be big pimpin when I get in the 30's and 40's, even if that is down the road aways, I know the older folks on this board would be envious of that.