I was a mixed stream student so if you have pure medical or non medical you already have an edge although i wasn’t 90+ scorer so success isn’t guaranteed :p
Here are some points which may help you for your studies.
- Board exams are more subjective as mine was so concentrate more on derivations and conceptual questions.
- Be thorough with ncert books, they are like black hole of knowledge. You will find them really helpful
- sketch out a good time table with atleast five to six hours of study and time for recreation as well.
- by heart the scoring part in chemistry like organic and inorganic one and give special notice to exceptions, they befool you in exam.
- solve previous year question papers and module papers.