GMAT Strategy

Heyy guys .Would appreciate if some1 can help me wid this :

I scored a dismal 550 2 weeks ago , on the GMAT. Though i was not scoring 700 on mocks .Was scoring around 640 - 670 on MGMATs & GMATPreps. But really don't know what went terribly wrong on the real GMAT.

Well , as every1 dreams of , I too wana score 700 + and yes now the time constraint is there .I have to give GMAT by end of november so that I could get sufficient time for R2 application process.

I have already done the following things during my prep :

Manhattan SC 4th Edition
CR Powerscore Bible
Math - 700 + questions
OG - 12

What different can I do this time?

I am thinking of doing the following things :

Practicing self timed sessions on LSAT - CR , SC & RC sets ( As LSAT Q's are considered difficult than GMAT Q's , so I think this will give me a boost while solving higher level ( 700 + ) GMAT Questions .Yes I have issues while solving 700 + questions - I believe this is why I am unable to reach up to 700 mark on tests )

Parallelly doing mock tests (1 test in every 5 days - MGMATs , Kaplans )

Then, could complete Verbal OG ( As my verbal do suck )

Will end with GMATPrep


Please, suggestions are needed .Help is required to pull me out of this low score frustration .I know time is slipping frm ma hand!!!