"studying" the OG

Thanks for the replies!
I really appreciate it.

I don't think I am comfortable with the topics tested. So, I will follow your advice and do the MGMAT books first.

I have another question: I already purchased the OG Quant and OG Verbal. I thought the OG Review Guide maybe didn't have that many more questions, but I was wrong... so I will be getting that too.

Which is better to start with? OG Review? or OG Quant + OG Verbal?
I have 12-13 weeks to study... I wouldn't mind extending it to 16, but I would really like to take the test October 11.

Would you be willing to evaluate this (tentative) study schedule?

Week 1- Gmat for dummies (I unfortunately purchased this book before finding this website. It's wordy and kind of annoying, but I'm just using it this week)
Diagnostic Test
Week 2- MGMAT Quant
Week 3- MGMAT Quant
Week 4- Mgmat books for math + Verbal

Week 5- OG Quant
Week 6- OG Review (orange)

Practice Test

Week 7- Verbal (using notesfound on this site and esnips) + OG Verbal
Week 8- verbal (using notes found on this site and esnips) – while still doing quant problems in OG Review (Orange) + OG Verbal
Practice Test

Week 9- Study OG Orange book + GMAT Challenges + Test
Week 10-Study OG Orange book + GMAT Challenges + Test
Week 11-Study OG Orange book + GMAT Challenges + Test
Week 12-Study OG Orange book + GMAT Challenges + Test
Week 13- (3 days) Go over problem areas + Test. Relax. Take GMAT...