Practicing previous question papers: It is always a good idea to go through previous years papers for it gives you a detailed idea of the type of questions frequently asked and also the level of difficulty.
Know your strengths and weaknesses: Your preparation is strictly governed by self-analysis. If you fail to find loopholes in your concepts or shy away from revisiting your mistakes, it is not going to do you any good.
Study within a schedule: Try to absolutely stick to your schedule and never procrastinate.
Revision notes: Lastly, make proper notes of concepts that require regular revision.
Remembering your syllabus: Keep a tab on the portion you have covered. This improves your preparation and helps you cover all the topics quickly.
For Physics, learn the formulas using the derivations. This helps to use the formulas’ steps while solving the questions.
For mathematics, learning the formulas will be the most important step.
Finally, after all the revision, you can solve the last year papers and evaluate your performance