Beat The GMAT a GMAT & MBA community

As you have already discovered, churning (answering tons of problems) won't help very much in your situation. Instead I recommend detective work.

Get a spiral bound notebook. Start doing problems in sets of 10. Keep all paperwork labeled and catalogued in the notebook. After each set of 10 problems (~20 minutes) spend ~40 minutes reviewing the problems and record a note for each one about what you *should* have done differently.

Things you should be tracking for EVERY problem in this notebook:
(1) Your work
(2) Your choice
(3) The correct answer
(4) Your confidence when you answered on a scale of 1-10
(5) Your timing to the second
(6) Corrections if needed (in a 2nd color)
(7) Learnings if relevant (in a 3rd color)

You should review this notebook in its entirety DAILY.

Once you have broken the 700 barrier, there is unlikely to be low hanging fruit remaining. You'll need to find a rare nugget that can push you over the edge. Hence the aggressive documentation I suggest above: the best way to find those rare nuggets.

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-Tom Rose

MIT Sloan MBA, Class of 2011
The MBA Show: http://www.TheMBAShow.com

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ManhattanGMAT: http://www.manhattangmat.com/gmat-tutor-rose.cfm