dunno if this is of any use, but Harrington suggests organizing notes like this:

Notes unrelated to Specific Hands
Number of tables this opponent plays at once
His standard Buy-In amount
Whether or not he auto-rebuys

Preflop Notes
Whether this opponent Limp/Calls
How this opponent makes and responds to 3Bets
How this opponent makes and responds to 4Bets
How this opponent makes and responds to preflop All-Ins

Postflop notes which apply generally to all actions after the flop
How strong a hand does this player need to bet or call a series of bets all the way to the river
What do unusual bet sizes mean for this player

Flop Notes
How strong a hand does this player need to make or call an All-In bet on the flop
Do they slow-play big hands?
How do they play draws?
Do they Donk bet, and what does it mean?

Turn Notes
How strong a hand does this player need to make or call an All-In bet on the turn
Do they play for Pot Control with Medium/Good hands?

River Notes
Does an All-In mean the nuts?
Is he capable of making a big bluff on the river?
Will he check down a strong hand out of fear?