If you did well on the SAT, you will do well on the GRE. It’s basically SAT 2.0, so study accordingly. The math is simple, with the hardest questions being about trig and maybe some limits stuff—maybe.
I took it three years ago, but I reviewed the night before and the day before and did very well. Full disclosure though, I have a math degree so I didn’t really review that. You know how good or bad you are with math. Don’t blow it off if you’re shaky.