Something cool happened to me today...
 

I sat down at a table, and saw 3 people had good notes I had previously written for them.

"Calls down Q high/low pair any board"
"Waits for turn with pairs"
"Bluff c/r"

Needless to say, I was winning nicely on that table. The moral? Make notes, do it regularly, even if the guy played against someone else, but still acted like a lag. Notes are very EV+.