hi parag,

for preparing jee, first of all u hav to build ur concept  n also i wud suggest dat u practise simultaneously as more u practise , more u shud learn....According to me practising is d real way for getting ur concepts clear n dat will help u to learn d formulas quickly..

so i will suggest u if go thru some concept den u must do some problems based on dis concept as dese problems will help u to clear ur doubts if u hav any n also help in clearing d real meaning of dat concept....This particular way of preparation is very much needed in physics , math , physical n organic chem..In regard of organic it is d only way dat u can learn d concepts.....

Regarding ur query abt books , for physics i wud suggest u HC verma , alongside wid ncert book ,

for math , der r many books ....

1 R. S. Agarwal Maths XI & XII Basic Text Books
2 S.L. Loni Plane Trigonometry Part I Recommended
3 S.L. Loni Co-ordinate Geometry Recommended
4 Hall & Knight Higher Algebra Recommended
5 I.A. Maron Problems in Calculus of One Variable Recommended
6 Vectors & 3-D Geometry Arihant Prakashan Recommended

For chem also der r many books

1 NCERT Chemistry XI & XII Basic Text Books
2 P. Bahadur Physical Chemistry Recommended for Physical Chemistry
3 Arihant Prakashan Organic Chemistry Recommended for Organic Chemistry
4 O.P. Agarwal IIT Chemistry Recommended for Inorganic Chemistry and reference book.
5J.D. Lee Concise Inorganic Chemistry Reference Book
6R.T. Morrison, R.N. Boyd Organic Chemistry Reference Book
7R.C. Mukhrjee Numerical Chemistry Reference Book
8 I. L. Finar Organic Chemistry-Vol I Reference Book.

but all of dese ncert chem is d best one

Also i will add dat u can take correspondence notes from any leading coaching institutes or u can subscibe our online reading matterials as it will be convenient for u ...u can visit us at www.askiitians.com