Make a schedule to cover all subjects at least 2 or 3 times by the time when the exam time arrives. The date has already been declared, which means you can make the most out of ur time. Try to understand concepts rather than just memorizing all the stuff cuz u will be forgettin many of em. Do questions when u finish one unit from previous year exams and your textbook. Use references specially foreign books( don't use extreme books fr,) use ur textbooks wisely. Don't stress abt it, the recent year exams are becoming easier compared to the earlier ones like 2007. Ask for help when needed dont be afraid to ask ur peers or teachers to help u out with smth that is botherin u. Don't forget to have rest cuz without it u will be forgettin things much more. As aforementioned, cover the lessons from ur text book, look for clarifications in youtube and reference book and then Do questions. If u hv any other related questions, do ask.