I don't know what other guys do, but I like to track my scores, fairways hit, greens in regulation and putts. Before GPS, I used to do it manually on the scorecard, now with my Garmin I can just sync my watch with my computer.
Another stat I like to keep in number of birdies. I don't keep it as a function of rounds played, but rather straight up. So 3 years ago, I made 154 birdies. I have not been that close before or since. And to be truthful, I feel I am putting now better than ever. This year, one week into September I am sitting at 88. So a realistic number this year will be 120 or so. Making it to 100 is a big deal for me.
Just wondering what other people track?