I use Promash to create recipes. Then I transcribe them into spiral notebooks so I can take note. Besides grains amounts, I write down hop amounts, alpha% and timing, water treatments and predicted pH, mash amount and ratio, grain temp, strike temp, actual pH, conversion efficiency, mash runoff gravity and volume, sparge volume and temp, boil volume, boil gravity and pH, mash efficiency, boil length (may boil longer if needed), final volume, time of pitching, temp at pitching, pH at pitching, brewhouse efficiency. Plus notes about any brewing anomalies.
I think there may be one or 2 other things.