see U don have much time to study so u need to plan accordingly.
1. Don't go by Institute book as it will be Lengthy go by Reference book (more smaller & simple one should be preferred, coz U need to Know something in every chapter & Everything in Few chapter's)
I know ins book are drafted V well but cannot surf it fast that's Y i'm saying lyk dis
2.Don't read group wise.
3.Self study can be done for theory subjects provided u do group discussions on all topics with few of ur friends who r attendin classes also so that u get some additional knowledge & Methods used by them.
4. read all subjects daily if not possible atleast in every two/three day's U should touch every book, reason being ppl study subject by subject after some three months u vil not remember what u hav read B4 so total waste U hav to start from Beginning again.
5. Use only 1 Brain don't get advices from everybody & End up some where else, Select somebody whom u know well & u think who vil help u on dis.
I hope this will help U in acheiving ur Goal.
read theory subject followed by logical & Vice versa whichever suitable to u.