The notes on the opponents that you make during the game are very important for success in poker. Very often it is these short notes that allow you to make the right decision in a difficult situation.
Also in this can help programs like Notе Caddy
Unless you play the same players over n over,,,i don`t see the point.I believe any player is capable of any play at any given time,so what`s the point of taking your attention away from the table to look at notes,that tell you what a player did last week? Stay focused at what happening in front of you,,,stay in the moment
Sound is the source of all creation,,,