The first thing which you need to do is clear all the concept which the teacher teaches. Besides that you have to do many MCQs , objective questions , numericals and many more. You need to buy advanced level books to clear IIT.
Some important thing you need to do I mentioned below.
- Time management
- Hard work with smart work
- Solved previous year papers.
- Go through offline or online coaching and practice their coaching materials Daily including DPP.