Received a PM asking me to respond. Good question!
Part of the answer depends upon your individual learning style - so you should think about what worked for you when you were studying in school.
In general, studies have shown that studying more frequently for shorter periods of time is better than studying less frequently for longer periods of time. I think about 1-2 hours is the best time length for one GMAT study session. It's long enough that you can get good work done, but not so long that your brain starts to get overloaded and can't retain the material as well.
I also think that "cyclical" studying is best. When I first joined the company and went through all of these books myself, I went chapter by chapter. First, read a chapter, then do some (and possibly all) of the questions given at the end of each chapter. Take notes, keep track of your work, and possibly make flash cards (if you find flash cards useful). Then do a few OG problems. Every time you run into any problems ("I forgot this formula, I used this technique incorrectly, I messed up my timing, I didn't know how to make a guess"), then go back to your source material and figure out what to do about whatever that problem was.
At the end of a study session, spend 5-10 minutes writing up a summary of your progress with that chapter. I'm really good at X. I'm okay at Y. I'm still struggling with Z. (Note: X, Y, and Z might be (1) specific facts or rules, (2) techniques, (3) timing, (4) educated guessing, or (5) some combo of the above.) Then figure out what you want to review and when. Perhaps I spend Mon through Fri doing new stuff, then Sat is for review, so I make a note that, on Sat, I want to review Y and Z, and I also want to try a few more advanced things in the X category - either from the advanced chapter, if there is one, or from higher-numbered OG problems.
At the beginning of a study session, review your summary notes from your last few study sessions in order to decide how best to spend your time.
When you finish a book, do the same summary exercise for the whole book and then think, "Okay, when am I going to come back and review the whole book, or certain chapters?" Mark it on your calendar.
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Stacey Koprince
GMAT Instructor
Director of Online Community
Manhattan GMAT
Contributor to Beat The GMAT!
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