Guidance on GMAT and Study Plan.

Hi All,

I have completed my B.E. (EEE) in 2009 and I am currently working in a MNC with 3.5 years of Exp. I have decided to pursue my MBA in 2014. I am going to take my GMAT in Nov so that I can have a span of 2 months of my preparation. I am little bit confused on my GMAT study plan.
Will 2 months of study period will be enough ?
Do I need to take the GMAT before November or Do I need some more time ?
After getting my GMAT scores how to decide on which school I have to apply on my score ? Like which will be safer etc.
I took the mock GMAT last week . I only got around 400 . But I am sure I can make it better.
I got very low scores in Verbal. Is there any particular method or study plan for improving my verbal skills.

Thanks in advance for you suggestions !!
Gops