During the last few days, work on your weak areas. Go back to the topics that you are not good at as well as the questions from those topics.
Work on practicing important topics with key-weightage and ensure you understand the concepts behind them. At this point, refrain from spending time on unfamiliar or difficult topics.
Take some short mock tests under time pressure to assist you in speed and accuracy. Don't take lengthy practice sessions, as they tend to make you tired.
Rapidly review your revision notes, formulas, and most likely to occur concepts in the exam. This assists you in memorizing key information.
Calmness at all times is advisable. Stay calm through confidence: relax with deep breathing, and avoid last-minute panic. Trust in your works and stay self-assured.
Organize your examination kit a day in advance with all documents like admit card, ID proof, stationery, etc. in order to have no last-minute rush.