• Choose the best JEE Math Books: Picking the right books is very important for sure success in any exam. It reduces your efforts, since you don't need to go through multiple books to understand different mathematics concepts.
• Solve 3 Math Test papers everyday: The only way to become an expert in JEE Mathematics paper is possible by practicing maximum number of mock or previous question paper everyday.
• Time management: Time management is one of the most crucial factors which can impact JEE score immensely. It is essential that you solve maximum number of mathematical problems within 1hour 20 minutes.

Hey dear!

Check out the the best way here.

To prepare for Maths the best way must follow best books

Then find the important topics for both JEE mains and JEE advanced.

Start optimizing short tricks.

Use the prescribed rules as chain rule for partial differentiations.

To solve limit sections, use L- hospital rules.

Do not skip integrations and differentiations.

Be aware of the different cases and possibilities.

Practice a lot, every time you will come to know a different approach of the question.

Divide the syllabus in easy and hard.

Review chapters as determinants, matrices which are  easy to score.

Hello dear, 

If you are preparing from a reputed coaching centre then you should strictly follow your faculty advise ,you should try to solve the daily work or solve DPPs, you should try to give test series regularly without any gap. And try to clear your doubts without any hesitation thoroughly cover each topic and try to practice more and more as maths is mostly all about practice .But if you are not from a reputed coaching centre then you should try to following books-

Mathematics (all series ) by Vikash Gupta 

Differential and Integral calculus by Dr. S. K.  Goel(Arihant publication) 

Algebra and calculus by cengage publication 

These book are more than enough for jee advanced mathematics.