I took the GMAT this week and got 760.
I had a little over 4 weeks to study for the GMAT between the time that I reached the decision to apply for the upcoming school year until the deadline for my MBA application for the upcoming year (in the specific university that I'm interested in).
I decided to divide that time frame as follows - the initial two weeks were dedicated to studying and solving questions from books (Kaplan, OG etc.), and another two weeks for solving a single CAT on a daily basis. In the final 2-3 days before the actual test, I added a little bit of OG question solving on top of the daily CAT.
Below are all my home test CAT scores + the actual final GMAT score, for anyone who may be interested in estimating their final test score based on the GMATPrep / Kaplan /
MGMAT / Princeton Review scores (the list is chronologically ordered from the first CAT taken to the last):
1. GMATPrep test #1: 750
2. Kaplan 2009 CD test #1: 620
3. Kaplan 2009 CD test #2: 640
4. Kaplan 2009 CD test #3: 630
5.
MGMAT #1: 710
6.
MGMAT #2: 690
7.
MGMAT #3: 730
8. GMATPrep test #2: 760
9.
MGMAT #4: 730
10.
MGMAT #5: 730
11. Kaplan 2009 (online test): 700
12.
MGMAT #6: 770
13. GMATPrep test #1 (retake after reinstall): 750
14. GMATPrep test #2 (retake after reinstall): 780
15. Princeton Review online CAT #1: 730
16. Actual GMAT score: 760
One last comment / suggestion – the test center where I took my test is about 1.5 hours by car from where I live. In order to avoid unnecessary traffic-related stress on the morning of the test (1.5 hours by car can easily turn into 2+ in certain scenarios), I decided to narrow the gap and sleep over at a friend's house (much closer to the center) the night before the test,. In reality, what happened was that because I wasn't sleeping in my natural surroundings, I ended up waking up after less than 4 hours of sleep, and wasn't able to fall back asleep afterwards. By morning (after rolling back and forth in bed for a few hours), I was so tired that I was extremely close to deciding to skip the test, as I was certain that I'm about to unavoidably flunk it (luckily, I ended up taking my chances and got a decent score). My point is, that you should try to avoid (as much as possible) any major changes in your daily routine in the 24 hours prior to the test (I was actually aware of this and did in fact avoid any changes, except for the "minor" issue of where to spend the night).
Good luck.