In terms of prep I studied since first week in August. Started by reading Princeton and Kaplan books. They are good starting material, especially in terms of learning about the structure of the test and learning tips and tricks. Then I brushed up on my fundas by reading Kaplan's Math Power and Princeton's Grammar Smart. Both are very good books; one should definitely have a stone cold knowledge of fundas before starting any GMAT specific prep. Next, I did all of OG 10 - res ipsa loquitur. Then I bought the Veritas Prep (
https://www.veritasprep.com) books from a friend who had taken the course and went through the whole Veritas syllabus. This stuff was awesome since it had tons of problems and the problems were the hardest ones from OG 10, LSAT, GRE, and Veritas' own. The explanations for each problem were very detailed and helpful. I am going to put the books on Ebay once I finish my apps after Jan. 15, but if anyone wants them now I will sell them for what I paid for them, $700 (the course costs $1400 if you take it). Lastly, in the final 3 weeks of prep I lurked on this board and just did a ton of quant problems. Verbal was never a worry as I test very well on standardized verbal exams. In quant I think it pays to focus on number theory (divisibility, odd vs. even, primes, remainders, units digits). Anways, I'm going to stick with the 740 and just focus on the apps. Good luck guys.