My health improvement.
Well the first thing that came into mind right off the bat was that I got 1st place in the "California Math League Contest", but this was when I was in 8th grade.
A bigger accomplishment for me was that, for my last year of high school, I still managed to get all A's and 1 B in my classes even though I couldn't concentrate/focus well due to a lot of fighting/arguing that was going on at home (there technically still is, but not as much).
That I'm a nurse! That I'm finally happy and enjoying life!