You should avoid taking stress and practice each and every day. Maintain a schedule where you can also relax a bit so that you have your recreational time too.
One and only suggestion : Dont ask for suggestions, believe in yourself.
Avoid involving in unnecessary things, and don’t forget to relax
Just don’t take it too hard on you, know your syllabus well, stick to the NCERT, avoid any unhealthy distraction , have a good diet
Try and create a schedule to develop the habits of studying and try different techniques of memorising and comprehending the concepts. Must use NCERT and practice questions from previous year board papers and sample papers.
Think positive and don't compare yourself with others
Do not stress. Revise your lessons time to time. Maintain a sleep routine and also a healthy diet
Make a timetable, don't take stress and study with calm mind
Concentrate on the subjects you are weak in or which seem difficult. But also don't neglect other subjects entirely but keep your prime focus on subjects like science, maths, accounts, economics.