Already got some valuable comments from sam..on a previous post..would also like to request some expert replies to boost up my preparation.

Details are as follows:

I just joined the BTG Network, have been following the forums for approx a month now.
Gave my GMAT First attempt in Sept 2009.Scored(500)
After that have work experience of approx 2 years Plan to pursue my MBA 2012 fall.
Aiming for the 2nd/3rd round in colleges.
Plan to give the next attempt sometime in First week of Feb 2012. Started my prep about a month ago, have brushed up my concepts on Quant & Verbal..
Gave a practice test of the Grockit website..Scored 650(Q 46 V33).
Gave MGMAT Practice test Scored 640(Q 47 V32)
First of all would like to know the accuracy of Grockit & MGMAT scores.
How can I further review this score for preparation?
Is any other test good to test the initial preparation.
Secondly, CR being on the lower side...kindly help with the same.

Please help with the preparation strategy as to increase the score to above 700 level.
Aiming for atleast 720.

My weak areas are CR & DS mainly...

Thanking you...

Regards,
Archit