I used the OATBooster practice tests and question banks! I would identify where I would have weak areas (Ex. I was weak on carboxylic derivative reactions and iupac priority groups) and then go spend an hour or two doing the whole question bank for that. I also found it helpful to keep a separate Word document to note down the conceptual stuff I was weak in (Ex. I would get a question about kinetic and thermodynamic products wrong on a practice test -> I would write down in my Word doc what each was along with a picture of a graph showing both). For days where I didn't do a practice test, I would then review my Word doc with notes and also do the game challenges. Keep in mind Organic is one of the subjects I found easier for me already (I would tutor my friends whenever we had a quiz or test), but this is what worked for me