I have been studying seriously for last 15 days. Below is where I stand today, appreciate if anyone can help me how to attack next 40 days. My exam date is Dec 14th.

Books In House:
OG12, Verbal and Quant 2nd edition, OG 13

Manhattan Strategy Guides, Foundations of GMAT Verbal and Math.

Verbal:
Foundations of Verbal, CR Strategy Guide, 75% of SC Strategy Guide, RC I plan to attack questions, after understanding the basics (don't want to spend too much time on RC basics)

Quant:
Foundations of GMAT Math
Chapters completed: Arithmetic, Divisibility, Fractions, Percents, Decimals, Equations, Exponents & Roots.

Yet to complete: Geometry, Quadratic Equations, Beyond Equations & Word Problems

What I fear is I have not yet touched any of the Manhattan Quant guides. However, I feel these strategy guides cover more or less same basics (with some advanced concepts). So I would be able review them real quick.

Am not sure when to start working on OG problems, and when is the right time to start taking mock tests.

Experts, please help what should be my approach for the next 30 days which is very important, as my exam is on Dec 14th.

Thanks,
Arun