Hello,

To score 150 marks in JEE Mains is really a good aim, you can follow the below guidelines to achieve it.

1. Have conceptual clarity in Physics, Chemistry, and Mathematics.

2. NCERT is the foundation for many questions, so focus on the NCERT books.

3. Prepare a proper schedule and follow accordingly.

4. Give tests after completing certain topics. You can also consider giving mock tests to improve yourself.

5. Revise regularly because retention of topics is very important.

6. Don't ignore any topic.

7. Cut the distractions, stay healthy and study well consistently.

You can visit the below website to know the concepts having more weightage.

https://engineering.careers360.com/articles/most-important-chapters-of-jee-main

All the best.