How to approach for ipcc(both groups)??

Hiii everyone...I have recently cleared my cpt in this june and now I have planned to go for both the groups in the ipcc exam in may 2014.

But,the question I have in my mind is how to approach for both these groups in one go??I have made some plans but,I would also like to get your views as well.

Which books should I follow for different papers and how to make my study routine in an effective manner???

I am a bit tensed as I am from "Science background" and along with it,I am also bit confident as I cleared my cpt exam in my first attempt..

Thanx for your suggestions...