Help raising my score

<p>So currently I'm at 630 in math, a 640 in reading and a 680 in writing (8 essay) - a 1950 overall. I want to get above a 2100 which is sort of a big jump. How can I improve?? I always hear practice tests are the best and I fully intend on doing a lot of practice, but what else? Are there good lessons or notes that I should be reading? Any advices helps!!</p>