The problem for me lies not as much in determining the information as in being able to quickly see the most important characteristics of a hand.
The biggest problem, however, lies in quickly putting it down. I try doing it by the method suggested in this article:
http://www.pokerstrategy.com/strategy/bss/1587/1/
But it is impossible to follow during live play. I am starting to ask myself: why would I even want to follow a principle like this during live play? What is wrong with writing the note quickly in my own words instead of trying to code the note into something like this: "MS, Q3s UTG, l/c isoR MP, AQTrA3 F ch/c T ch/c R ch/cAI" while playing at 4 tables simultaneously. Maybe this method is the reason I am not as successful in this particular aspect as I could be?