How to improve SAT score

<p>I took the SAT in January and here are my scores:</p>

<p>CR 630
M 660
W 590</p>

<p>I didn't study at all for the SAT in January and those are my scores. A lot of my friends say I got a good score and I should be happy, but I definitely know I can do better. I want to try to raise my score to at least:</p>

<p>CR: 690
M: 740
W: 690</p>

<p>I probably won't take the SAT again until next fall (although depending on how I feel, I might take it in June) so what would you guys suggest I do to study? I already have the big blue Collegeboard book and plan on working through that book but what else can I do? Thanks!</p>