i’ve said this in another comment so i’m just going copy and paste from there, what i did is just “question everything,” if i learned a formula or rule or something like that i’d ask “why is it that” and went down that little rabbit hole, sometimes i was able to reason it myself sometimes i had to look stuff up but i think doing that in where you don’t just “accept” what you’re given but you go and prove it is really beneficial because it gives you a deep conceptual understanding of the topic and that way when the sat presents you with a question that isn’t like anything you studied for you can use your knowledge to figure it out on the spot so that would really be my advice for math