What should I do about the SATs?

Recently, I have received my scores on my PSATs. I got a 1710/2400 which isn't very good. It worries me because I am a good student. Right now my weighted GPA is a 4.6 as a sopre and a total high school GPA of 4.55. I scored a 570 in critical reading, 550 in math, and 590 in writing. What test courses or prep books do you suggest I use? Please don't tell me to forget about just because I am a sopre. What can I do to improve my score?