Here are some of the important tips you can follow.

Make a Preparation Strategy: To obtain the success you should follow a systematic approach. You must prepared a detailed schedule about the topic, chapters & subjects.

The plan as per your Capability: It is important that you should make your time schedule as per your your potential, capability & study style.

Work on Your strengths & Weakness: It is important to analyze your weak areas of your study. Once the strengths & weakness have been identified then you can put your efforts to improve your that areas.

Solve Previous Year Papers: As the sample papers present an overview of the type of questions asked in the examination. So go through with sample papers & its regular practise will get a clear picture of the type of questions asked in the exam.

Group study: Group Study help you to expand your knowledge and also help to get each others reviews & suggestions on difficult topics.

Join Mock Test: Mock test will help you to analyze your performance & proper time management.

Study material:

Firstly prepare with NCERT books, it will help you for basic knowledge & concept related to area of the study

Other books you can refer:
Physics- HC Verma
Chemistry- RC Mukherji & OP. Agarwal

Good Luck!

You can follow below recommended books for your preparation P/C/M

 

• For Physics-

Fundamentals of Physics by David Halliday, Robert Resnick, Jearl Walker. It is published by Wiley Publication. Another book is Concepts of Physics by DC Pandey

•  For Chemistry-

Moderns ABC of Chemistry for Class-XI with CD by Modern Publishers. Another book is NCERT Physical and Organic Chemistry by OP Tandon.

•  For Mathematics-

Mathematics for Class XI by RD Sharma. It is published by Dhanpat.

 

 

All students who have appeared for the KVPY exam say that going through NCERT study material helps a lot in cracking KVPY.

Below are the recommended books for your preparation for KVPY-

    For Physics-

Fundamentals of Physics by David Halliday, Robert Resnick, Jearl Walker. It is published by Wiley Publication. Another book is Concepts of Physics by DC Pandey

     For Chemistry-

Moderns ABC of Chemistry for Class-XI with CD by Modern Publishers. Another book is NCERT Physical and Organic Chemistry by OP Tandon.

     For Mathematics-

Mathematics for Class XI by RD Sharma. It is published by Dhanpat.

     For Biology-

Elementary Biology Volume 1 by KN Bhatiya and MP Tyagi. Publisher is Trueman.

It is not the quantity but quality of books that matter.
All the best.