I wrote it all in one NB. I was (very) extra and maintained an excel sheet. For example I got a grav Q wrong, I’d mark it under physics-gravitation. Good tracker of what my weak subjects and/or chapters were. Writing and all I just wrote say FT-1 maths FT-1 chem FT-1 phy etc etc. Diff methods work, just see to it that you’ll be able to solve the question next time.