Solve all questions.
Be precise, follow the word limit.
Highlight the main points with same pen or pencil.
Don't use sketch pen/red/green etc. colour pens.
Carefully give numbers to answers according to questions.
Do proper time management.
Keep water bottle, chocolates etc. as an energy booster.
Don't think after writing think before.
Don't calculate marks after, it may affect your next paper.
So ALL THE BEST TO ALL OF YOU.