I think notes are very important. Do you take notes with your software (like HEM or PT)? I usually just open the note screen for the player I want to take a note on and type something out. I put the game (50NL etc) and use shorthand to make my point. Just something that will jog your memory next time. Another thing I do if I just don't feel I have time is mark the hand with Holdem Manager and take notes when I review my session (I usually play between 10 and 15 tables). But I think note taking is only going to help your game and the higher you go the more important notes are going to be, so get used to it now. I've heard of higher stakes players that ONLY rely on notes and not HUD.