Help with Study Plan

Hi,

I am looking for expert suggestions on the study plan I should follow.

My Background:
My work-life is unpredictable, which has resulted in an inconsistent study pattern for me. Also, I am below average in terms of reading speed. I am able to solve most of the questions while I study, but I fail to show similar performance in timed tests.
So far, I have been able to study intermittently for 3 weeks. I started GMAT preparation with one week of Quants (my old Career Launcher CAT Books), after which I took GMAC Practice Test - I. My performance: Overall-650, V-26, Q-50. I was able to properly attempt only 24 questions in Verbal, after which I randomly marked the answers.
This followed by one month of break and then two weeks of Verbal study (Kaplan GMAT Premier). Yesterday, I took GMAC Practice Test - II. My performance: Overall - 700, V-35, Q-49. I was able to attempt 29 questions in Verbal, but got slow in Quants.

Tentative Study Plan:
For the next two months, I plan to do the following:
1a. Read novels
1b. Practice OG (dividing the content for two months)
1c. Try to cover Manhattan SC, Powerscore Bible CR and quant topics online
2. Take one Full-Time Test (from 6 Manhattan Prep & some free tests) every week
3. Revise and take GMAC Practice Tests

Help I am Seeking:
1. How would I know I am ready to take GMAT? At what point should I register for it?
2. Given my scenario, can you suggest a better study plan?
3. Also, given my scenario, can you suggest better-suited books?

Thanks