You can prepare for JEE Main by following below strategies-

1. Know your Syllabus Well: Check on the full syllabus of JEE Main  before laying out your schedule for the upcoming studies.A proper schedule can be created after going through the official syllabus released by the authorities of CBSE.

2. Work on a Time Table: After carefully checking the syllabus of JEE Main , work towards creating a perfect timetable which will fit your schedule while leaving enough time to prepare for the examination within the days left.

3. Make your Basic Concepts Strong: While it is essential to study the topics mentioned in the official syllabus, it is also advised to study the basic concepts well first. By knowing the basic concepts of the units involved in the examination, you will be able to understand each topics well and in depth. This will result in a greater understanding of the topics and will make it simpler for you to study complicated concepts present in the syllabus.

4 . Write Notes and Prepare Flash Cards: keeping notes greatly helps during the preparation process. Notes written in small diaries are highly accessible and you will be able to study from them anywhere anytime. By writing down those complicated theories and formula and revising them, you will be able to remember and understand them more efficiently. Similarly, create flash cards to help you with quick studies and revision.

5. Attempt Mock Test and Solve Sample Papers: Attempting mock tests and solving sample papers is perhaps the most popular strategy to prepare for any examination, and it is rightly so. Mock tests will give you an almost real experience of how the examination will be. By solving mock tests, you will be able to work on time management while at the same time understanding the question paper pattern. Similarly, sample papers will let you practically apply all of the topics you have been studying till now. Preparation using mock test and sample papers will let you know how much syllabus you have covered and where you will need to work to improve.

6. Revision: While studying it is important to revise those topics which has already been studied. It is advised that each day, a certain amount of time should be divided for revision purposes. By revising the previously studied topics, you will be able to keep afresh everything that has been studied till now. Revision is very important as the syllabus is quite vast and all topics have similar importance level which has to be remembered and known by you.