There are ample of books available in the market, However some top Books for indepth Preparation and almost complex problems with lucid understanding  are shared below as recommended by toppers.

Physics:-
Concepts of Physics Vol I and II by H.C. Verma
.New Pattern JEE Problems: Physics by DC Pandey.

Chmeistry:-
Organic Chemistry by O.P. Tandon
Numerical Chemistry by P.Bahadur

Mathematics:-

Maths XI & XII by R.D. Sharma

All the above books have been recommended by various toppers.
Some top critical things to look out for are shared below:--


1. Solve numerical problems as many as possible

At least try to solve 60 problems from day 1 including PCM.

2. Always note down your mistakes

Keep track of your efforts so you never make the same mistake twice.

3. Make a target for every day

Its good to have a target so you know what youre working towards. Always aim to achieve that.

4. Develop a subject-wise strategy

Spend more time with difficult subject as there is more scope for improvement.

5. Fight until exam ends

Give your best till the end. Do not give in to slack as that will be easily become a habit.

6. Target the difficult parts of the syllabus

Focus first on the difficult topics along with concise, crisp, easy-to-look up notes.

7.Analyze previous year paper pattern

Strategise your study plan accordingly based on the previous years patterns.

This is what CBSE is.
A guys with English like this can get 92%.
It's not his fault it's the course structure, there's no grammar in the syllabus

Hey you have best percentage in 12th . Why have dropped this year for jee?

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