Improving SAT scores.

<p>I am currently a junior in high school and just received my scores for the fall SAT. I received a 680 in CR, a 690 in Math, and a 700 in writing. This is my first time ever taking the test, and I didn't study or take any classes, so overall I am quite pleased. However, I think I'm going to take them one more time and I was wondering if anyone had any tips or recommended books to bring each section up 30 to 40 points. Thanks!</p>