Finish off three simple topics in days 1 through . Do this even if you have a load left. 3 topics are the most you can do.
Continue solving sample papers and just take regular breaks on days 4 and 5.
Work with the sample papers and think positive on days 6 and 7: These are the most crucial days, since over working or under working could lead to mishaps. Solve as many sample papers you can. Periodic revision is also very important, as it will help you to recollect information faster.
Preparing on Test Day
Wake up early. Wake up early and go through all the formulae and equations you need. Have a balanced breakfast, make sure you have all materials you need (HB pencils, ball point pens, erasers, calculators if allowed) and go to the exam with a positive mind.
Make full use of the reading time once you enter the hall. Read at least three quarters of the paper. Leave 5 minutes of your reading time to try to remember the topics you learnt.
Remain calm. Most people are unable to complete the full Olympiad in time because they are too busy stressing out. Learn some quick meditation techniques and use them whenever you start feeling stressed. Don’t worry, you’ll manage to finish the paper in time.
Make your marks carefully. Most of the Olympiads today are OMR sheet types, where you need to darken circles. Once these circles are darkened, it is really hard to erase the mark and re-mark, since the OMR reader considers even a small dot as an answer. Remember, you need to check where you mark twice before you mark.