GMAT Strategy

Hello Guys,

I have been working on the GMAT since October 2010,

I first took GMAT prep 1 in November and scored 480 V17. I then worked worked on my weaknesses, which are RC, SC and CR. Over the last few months I was working on the verbal part using Manhattan GMAT SC book. I was able to improve my verbal score....and my overall score but today I took GMAT prep 2 to gauge my level and scored a disappointing 590, the only positive is that I only made two mistakes in SC. As I am taking the real GMAT on July 7th, I am in panic. I need to improve on critical reasoning, even though I went through the CR bible, I am still really weak on this section. ANY SUGGESTION on how to improve????

Many thanks in advance

PS: I am non native English speaker


Feb 13 GMAT prep 1 Q47 V24 580
Feb 26 GMAT prep 1 Q48 V24 590
Feb 27 GMAT prep 1 Q49 V25 610
March 6th GMAT prep 1 Q49 V28 640
March 12th GMAT prep 1 Q48 V36 690
March 13th GMAT prep 1 Q49 V36 700
March 20th GMAT prep 1 Q49 V35 700
Apr 9th GMAT prep 1 Q50 V41 750
May 8th GMAT prep 1 Q49 371 700

May 30th GMAT prep 2 Q42 V29 590