Here's my suggestion, but I strongly recommend you check out the "stickied" posts at the top of "Share your GMAT Experience" board. It has some VERY good and detailed study methods there. That's where I started.
Anyway, I can only recommend the PR book (but NOT the PR CATs), as it does give you very good intros and refreshers for math and verbal.
1. Read through the PR book on how to take the test for each section, watch the DVD, and review your math. This should take 1 week if you do 2-3 hours a day.
2. Go to the OG11
, and take the diagnostic test at the beginning of the book, untimed, and see how you do. This should give you a good idea on how to take the test and answer the quesitons.
3. Download GMATPrep
from mba.com. Download PowerPrep
by doing a search for "PowerPrep download" in GMATClub forums or on Google. PowerPrep is the older version of GMATPrep. It has a lot of problems from OG11
, so now looking back, I would actually suggest you take PowerPrep Test 1 first and see how you do. That will give you a good idea of A. How good you are on the test, thus how much you need to study, and B. Which section(s) you're weakest in.
4. Now if you score 650+ in PowerPrep1, you probably don't need *too* much studying, so start doing the OG11
quesitons from the 1/2 way point on in each section (if there are 100 questions, start from question 51). Keep track of which ones you miss and your "hit rate". Try to time yourself and keep to 2 minutes per problem.
5. If you get 650 and under, I would suggest you get Manhattan books
for the sections you're weak on. Their books are a good structured way to study questions through the OG.
6. If you run out of problems to do and your practice scores are still somewhat low, get the Verbal and Quant review also from OG.
7. Take PowerPrep2 after a couple weeks of studying. You'll see some repeat questions from OG, but it'll give you a good idea of how you're doing.
8. Take GMATPrep1 after a month of studying. This will give you a very accurate indicator of what you may get on the real GMAT.
9. I don't recommend any CATs except for Manhattan GMAT
CAT, and even then, beware of the math section.
10. Keep reporting your progress here on GMATClub and we'll all help out!