If you are going to take the CCNA exam tomorrow, I would not suggest cramming or studying that much. At most, I would do some light subnetting. Relax. If you have done the work and are prepared, you aren't going to forget it in a day.
I agree with Erick. At this point, if you don't know it you won't learn it over night. Relax and rest up for the exam.
so how did the exam go? did u pass?