do more of what you did during games 1-500 and less of what you did 500-900
Lol... as I mentioned in my first post, I did not tweak my game. One thing for sure though I played much more $10 buyins that in the first 500 games. As always, thanks for the replies.

Also be aware that it's possible to run very bad at SNGs - 10 game OOTM streaks and 30+ buyin downswings are a standard feature of this kind of game.
30+ buyin downswings!!!!??? I thought it could not get any worse.