Dear Saurabh,

In order to prepare for JEE Main in last 10 days you can make your time table according to your comfort and allot the time as per your strength and weakness. 

Focus on the topics which carries more weightage in the exam. Solve as many as MCQs for your practice.

Practice is the key to score good marks in your exam so make sure you solve as many as mock test series for your practice and focus on time management. 

Always analyse your mock test to know your mistakes so that you can improve it.

Refer previous year papers as well to know the level of the exam.

All the Best for your preparation and exam!!