Newbie - Oft Asked Question-GamePlan

Thanks for the advice. Wow there really is a lot of stuff that is available here.

I have two questions which I hope would help me move forward at a more rapid pace:

1) After reading through the forums here & doing a bit of self study for the last two weeks, I attempted the Kaplan (2005 ed) CAT. Got a lowly 620 (39 Quant/ 36 Verbal).

I aim to take the GMAT in another 2 months time (don't want to stretch the prep beyond Oct end). And I'm aiming for a score in the range of 720+.

If you were to give ONE advice on how to structure my prep for the next two months what would that be?

2)
Here is the list of resources I already have (don't ask me how I got stuck with these), but I'll perfer not to invest much more if these resources are not way off:

OG Verbal & Quant New Color-coded books
OG - 10th ED
Kaplan with CD - 2005 ED
Princeton with CD - 2005 ED

Any suggestions for ONE more resource that might help me with my aim?
P.S. If you feel carrying on with any of the above mentioned resources will do me more harm than good, please let me know.