GMAT Strategy

I would be indebted if any of the GMAT instructors can help me with the current situation..Have GMAT exactly a week after.

I followed foloing books - OG 11 and 12, Kaplan 800, Kaplan Verbal, Kaplan Premier and Mahattan SC
Following are my test scores so far:
GMATPREP 1 - 730
GMATPREP 2 - 720
Kaplan 1 - 610
Kaplan 2 - 630
Kaplan 3 - 640
Manhattan GMAT 1 - 730
Manhattan GMAT 2 - 770
Princeton 1 & 2 - 740 and 730

I have been consistently getting 50 in quant and verbal has been a weak point... In verbal I am getting almost 10 questions wrong in every test (including the one where I scored 770.. quite wierd).. Kaplan has been a disaster with almost 15 questions wrong in every test..

Please tell me what should be my strategy for remaining one week.. I need to settle down to a 740-750 score :roll:

Also please tell me how good representative are Kaplan tests??
In verbal, CR has been quite well, SC is average and RC is pathetic.. Is there any way I can increase my verbal score in last one week??

Would appreciate any bit of advice

Thanks in advance,....