Here are some preparation tips you can follow for your preparation.

Manage your time and always prepare more for chapters you are weak in, it will help you to not loose marks in the examination.

If you are well in a topic then prepare that well it will help you to score more in the examination and it will also consume less time to revise.

Once in a week, go through those chapters you are not comfortable in.

In the examination month, Avoid preparing for new chapters, it will help you to avoid extra stress.

Do practise as much you can with previous year papers.

Give more time to online mock test. You can also refer below given article for the preparation of the exam.

IIT JEE Preparaion Tips