Math Study Regimen

Hello Everyone,

I took the GMAT about a week ago and didn't do so well. I'm not sure what I did wrong because I felt VERY confident with my answer to pretty much every question I got. I'm taking it again on the 16th of December and I have developed my study plan. However, I'd like to see what kinds of study plans other people have put together. Just some background:

1. I took the Kaplan Prep Course and I feel that I am pretty good with math.
2. All of my practice test I scored between 600 and 620(all of them were Kaplan CATS) but I scored a 580 on the actual test; raw score 34Q.
3. I have quite a bit of time that I can dedicate to studying.

Resources:
GMAT CLUB membership
OG 11th edition
OG Quant Review Book
Kaplan Course Book
Kaplan Online Course Material (available until Dec 16th).
xlmath.com membership

I feel that my weakest skills are with probability and combo/perm, but I am usually able to work my way through them unless it is ridiculously difficult.

I could really use some help with this. Right now I am rotating days between math and verbal. I am focusing on a specific topic during the Math Days. I'd love to see what some of you used to succeed at the GMAT QUANT section.

Thanks,

Chris