Funny. After posting for a few days, I can now begin to imagine how often you guys must answer the same questions. I think the consensus on these forums is to do the following:
1) Take a practice test offered by GMAT Prep (download that software at mba dot com).
2) Depending on your scores (Q and V, independently), begin with either a foundations book (for math, verbal, or both), a general book (consensus appears to be Kaplan Premier), or the
Manhattan GMAT book series. It seems like good cutoffs for those three segments may be approximately <30, 30-40, and 42+, respectively.
3) Read through the quantitative sections of the respective book, carefully taking notes on subjects and strategies which you find to be important. Then answer the questions the book offers at the end of each section. After answering all questions, review those you missed by referring to your notes. Make sure you do not proceed until you fully understand the concept tested and what went wrong.
4) Now, answer the suggested questions from the Official Guides (
Manhattan GMAT has a list of relevant questions at the end of each section), repeating the same process as before.
5) Proceed to the next section. Repeat.
O) Optional step: If you are aiming for a 48+ on Quant., then you should tackle the questions (using this same process) in the
GMAT Club tests,
Manhattan GMAT Advanced Quant. book, or Jeff Sackmann's books.
6) After finishing the quantitative sections, repeat the process for Verbal, using PowerScore's CR Bible in lieu of the
Manhattan GMAT CR book.
7) Leave yourself 2-3 weeks after finishing all of this to review your notes, particularly regarding the subject areas where you are most weak. One way of measuring this is to compile an
error log when answering questions.
8) Take around 5 CAT practice tests in the two weeks before the test to really nail all the areas and to build your confidence.
9) If you haven't already, also read up a little on AWA in the final two weeks.
10) Take the test. Boom. Done.
Leave kudos if you think that's helpful! In fact, this is the plan that I have developed for myself, so I would especially appreciate constructive criticism from you experienced guys.