Making player notes

[ANY2CARDZ]

Im trying to figure out a system for make notes on players. But i always write too much i.e. it takes too much time. And they arnt always that helpful, becuase im not always sure what to write. I'd love to hear some of your systems, what you specifically like to point out. what your abrevs are. I googled it with no luck.. is there a site or another good thread with this info? Thanks