^^ I started to track my every possible stat myself. Very therapeutic, actually, and kept me distracted during play, which is good (not taking stupid shots in bad position, etc.).
I find that busying myself with other activities during play, as opposed to simply watching the table the whole time, lends itself to a better result - but that's just me. Also - after a big win or cash, I tend to play a little looser trying to get a big lead early in MTTs. I start picking up bad habits, and before you know it, I'm looking at my bankroll thinking...WTF happened?
Another thing - after a big cash, make it a point to cash out a good chunk of your winnings, especially if you aren't a multiple MTT-player reg playing every day. Keeps you from completely tanking your bankroll and still gives you a feel of confidence when you turn a $50 deposit into a nice $500 WU or check (or, a $$ P2P transfer, which is becoming more and more the way to go for me to avoid delays). And even if you do manage to lose what you left on your account after your winnings, you can always reload - however, I too feel that sting of having to reload, especially after you think you've turned a corner, saying to yourself "I WILL NEVER HAVE TO RELOAD AGAIN! I IS A WINNERS!!!"
I need to follow my own advice more...haha - but keep it simple, stay patient, and the good players will win more than they lose, in the long run.