I have been inspired to improve my note taking after reading this post on 2p2:

Almost there with Success and Failure (Long) - STT Poker Strategy - Single Table Tournament Poker Forum

My question for everyone is, what types are things are you noting on players? Do you have some sort of system or routine you follow while you play?

Currently I try to make notes of anything players show down in 3bet pots, if they show floating tendencies, and any bizarre or real donkish plays. Any recommendations on how to improve this aspect of my game?