For most people, note taking in BJJ is a list of techniques and drills that were covered that day, or subs and passes performed successfully while rolling.
Note taking in this way is a logical way to start, especially if you’re brand new to BJJ. Not only does the act of writing help with knowledge retainment, it’s also a good way to keep yourself accountable and make sure you come to class regularly, which is arguably the most important element of progressing at all.
Passive to Proactive
However, I think note taking becomes more useful after you have a bunch of notes already accumulated. My recommendation is twofold – first, set aside time at a regular cadence (ex. every weekend, end of month) to sift through these records and find patterns in your performance.