What are some things I can do to get a good score on my SAT?

I took my PSAT and got a 1450 and a 1390 on my real SAT (Which getting too confident brought me down and I felt that I didn't have to study much for it. I was wrong :/) I plan on taking it again in July and I was just wondering if anyone had any really helpful tips. I'm absolutely horrible in Math, which is a cl I don't have this semester so studying for it is making it a bit more difficult.