Dear Meet Patel,

After your boards exam you should start your revision for all the three subjects. Focus on the concepts. 

You can take help of your notes and flash card if you have prepare them.

Focus on the topics which carries more weightage in the exam. 

Refer previous year papers to understand the exam pattern and to know the level of the exam.

JEE is all about the practice so make sure you need to solve as many as mock test series for your practice. It will also help you to analyse your preparation level and to know your strength and weakness. So, you can work upon them.

All the Best!!