Hi max1212,
These days, a 700+ Score is a bit shy of the 90th percentile - so that clearly means that most Test Takers will never score that high. By extension, no combination of study materials will guarantee you that type of score result. That having been said, the GMAT is a predictable, standardized Test, so you CAN train to score at a higher level.
From your post, it's not clear whether you are just beginning your studies or you have put in some significant study time already. If you have not already done so, 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) Is your goal score 700 or something else?
2) When are you planning to take the GMAT?
3) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich