Hi kingcrimson282,
Based on your post history, you have studied for the GMAT at various points over the last couple of years. When it comes to studying for the GMAT, there are lots of potential study materials that you might use, so before I can offer you the specific advice that you're looking for, it would help to know a bit more about how you've studied during that time and your goals:
Studies:
1) When did you take the Official GMAT and what were your Quant and Verbal Scaled Scores for your 550?
2) What study materials have you used so far over the course of ALL of your studies?
3) When was the last time you took a practice CAT/mock and how did you score (including the Quant and Verbal Scaled Scores)?
Goals:
4) Is your goal score still 700+?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich