I would suggest you to go through with NCERT books as it will help you to make the basic fundamental strong. The other books you can prefer:

 Books for Mathematics

    Trigonometry by S. L. Loney

    Higher Algebra by Hall & Knight

    Maths XI & XII by NCERT

    Co-ordinate Geometry by S. L. Loney

    Problems in Calculus of One Variable by I.A. Maron

 Books for Physics

    Problems in General Physics by I.E. Irodov

    Fundamentals of Physics by Halliday, Resnick & Walker

    Concepts of Physics Vol I and II by H.C. Verma

 Books for Chemistry

    Organic Chemistry by Paula Bruice Yurkanis

    Organic Chemistry by Morrison & Boyd

    Inorganic Chemistry by J.D. Lee

    Numerical Chemistry by P. Bahadur

Here are some preparation tips you can follow.

Make a plan to manage Time Well- Make a time table and devide your time in two parts first your study plan & secondly your daily routine works. Within stipulated time you should finish the syllabus. You must draw certain goals. Depending on the difficulty level of the chapter or the topic, You must decide for yourself in how many days you will be able to finish it. Before proceeding towards the new topic, you must ensure that you finish the previous one and Revise thoroughly.