Notes are very important, but remember there are some really good players out there that switch up their games alot depending on who they are up against in a pot.

I don't worry too much about their raising ranges and limping ranges, PT helps me with that. I make notes on how much they continuation bet, how much they bluff and into how many players, what hands they'll call down with.

I have alot of notes like
"If I keep calling, he can't stop betting"
"Turtles with TP against flop aggression"
"gives alot of free cards"

I spend nearly all my time when I am not in a hand either analysizing the players at the table or taking notes on their play. But I have two problems...1) I write narratives that are WAY TOO LONG (I need to use a system like that on tightpoker.com), and 2) I don't always pay attention to my notes! The notes that I find most helpful are those that tell me how passive/aggressive a player is AFTER the flop and how often they bluff or c-bet. But again, the note is only helpful if I actually read and believe it (like when I reraised allin on a player that I had noted would only raise with a monster hand....OUCH).

BTW, if I know someone is a compulsive bluffer, I will note it so that I can let them do the betting when I flop a good hand. This is a great thing to know that can pay off big.

I also note the game that I am in, both type and limits. I noticed a player with notes from a NL25 game playing in a NL100 game and was able to take advantage of the fact that he was playing with "scared money".

__________________
CORYAN
I don't play a lot of hands....I just play a lot of them poorly.