Hi jhicks33,
If you do enough research (including reading Course reviews), then you'll likely come across any number of people who have used a particular GMAT study resource and hit 700+. That having been said, the best materials that would help YOU to maximize your Score on the GMAT might be different from those though. A 700+ Score requires a certain amount of consistent training (and since that Score is approximately the 90th percentile, most Test Takers never score that high - regardless of how long they study or the number of times that they take the GMAT). As such, you have to think about this entire process as an investment of your time, energy and money - to learn the content and train to use the proper Tactics (and not just as a series of "tips" to try to string together).
From your message, it's not clear whether you've put in some serious study time already or you're just starting out. If you're just beginning your studies, then it would be a good idea to take a FULL-LENGTH practice CAT Test; you can take 2 for free at
www.mba.com (and they come with some additional practice materials). If you want to do a little studying first, so that you can familiarize yourself with the basic content and question types, then that's okay - but you shouldn't wait too long to take that initial CAT. That score will give us a good sense of your natural strengths and weaknesses and will help provide a basis for comparison as you continue to study. A FULL CAT takes about 3.5 hours to complete, so make sure that you've set aside enough time to take it in one sitting. Once you have those scores, you should report back here and we can come up with a study plan.
I'd like to know a bit more about your timeline and goals:
1) When are you planning to take the GMAT?
2) When are you planning to apply to Business School?
3) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich