i tend to do overnighters for every of my major exams such as pre-trials, trials, etc. it helps with remembering things better and clearly or else once you shut your eyes, everything just floats away. mother and v drinks could also bring a great boost during the night. good lucks. ;)
there is no way i am ever going to do year 12 again.
edit: if you're looking for advice, just do the best you possible can, plan your time well, no regrets.