GMAT Preperation

[prashant_16]

HI

Can anyone tell me how to go about the gmat preperation.

I have following books with me :

1.OG Verbal (11th ed)
2.OG Quantative(11th ed)
3.Traning materials from ********(Delhi/Bangalore based GMAT institue) and IMS.
4.Manhattan quantative series
5.Manhattan SC
6.Kaplan 800
7.Manhattan Reading comprehension and Critical reasoning


I have started with manhattan quantative series and traning materials.

Is tha above material enough to score good in GMAT????
Ideally how many months it takes for serious prep???
Do i need power prep software???


Looking forward for your answers.

[hai_vinu]

Even I would like to know .. Someone please answer! THanks in advance.