Here are some preparation tips for the preparation of JEE Advance given below:

Be focused: First of all, you should be mentally prepared and keep a positive approach towards your goal.The competition has become so high, you need to give a tremendous effort mentally and physically. You must raise your level of performance to be able to crack the exam.

Proper utilization of time: You must follow a strict timetable to utilize your time in the best way. Solve more and more problems, discover more and more new tricks. You should make notes for the topics in which you are weak. This will help you to perform well in exam.

Interact with JEE experts: Keep in touch with the students who have cleared JEE test or go through with the toppers strategy so that you can get a better guidance. 

Group study: Working with a competitive study group goes a very long way in the successful preparation of IIT-JEE. Group discussion with fellow students will recreate a cooperative environment to multiply your knowledge exponentially. You can Quiz and challenge each other with questions from the IIT-JEE syllabus.

Revise thoroughly: You should revise the syllabus as many times as you can. Doing so will help you in the following ways:

It will increase your test-taking speed.

It will help you overcome panic.

It will give you a clear picture about the topics you are weak in.

Good Luck!