Dear Tushar,

For scoring good marks in any of your exam these are main tips and strategy to be followed:-

1.)Get to know about the syllabus and thoroughly go through it.

2.)Maintain your time table and have consistency to follow it.

3.)Take Guidance from your teachers and revise everyday.

4.)Always motivate yourself to achieve success in your life.

5.Practice test papers of previous years.

And you want to prepare for JEEMAINS exam so first and very important thing that you should clear you base of 11th and 12th standard this will make things somewhat easy. And then study reference books after this when you will complete you syllabus now start practicing questions and try previous year papers.

I hope you got the answer!!

ALL THE VERY BEST!!

If you have any query then feel free to ask!!