Make a schedule in which you have listed what to do at what time, creating a schedule can be a game changer, divide the syllabus into small portions and try to cover them accordingly.
Always practice past years' papers this will give you an idea about the type of questions and how they are framed. This will even be a best practice for your board exams.
Take regular breaks do not just indulge in your books for 24 hours, give your mind a bit of rest and do something else that will freshen up your mind.
Health is very important, so do take care of your health. Do not skip your meals, eat healthy and stay fit.
This is one of the best ways to study but the focus should be on study. Studying with friends can be enjoyable and you can help each other.
Revision is one of the most important things about the things you have learned. Don't just read your notes but even test yourself.
Give relaxation to your mind and body, especially before the night of your exam. Avoid last-minute studying.