SAT Practice suggestions?

<p>So I only have taken one SAT (Oct 2010 one) and my scores were 600 CR, 660 Math, 510 Writing (essay - 8). I didn’t practice for this one. Since I used a fee wavier I got a QAS in the mail. I also signed up for the Jan 22 test with a fee wavier.</p>

<p>So should I just review my QAS for the test or get some kind of supplemental practice book? Should I get the Official SAT Prac book (about $21) or get the online course ($30 with fee wavier discount) or something else entirely?</p>

<p>Now I’m very good at math (only got 8 wrong, I think most of those were bubble mistakes) so I don’t expect that to be a problem but my main problem is the writing. I have never had a teacher that taught grammar or identifying sentence errors so I just picked the ones that sound the best.</p>