Sleep.
Hot tea, or alternative (the hot part is the important bit).
Keep on top of your nutrition (maybe get some fresh fruit, and make sure to eat - don't want to drain your reserves)
Water, water, water.

Maybe not the way we all like to taper before a race, but if you listen to your body and take it easy, you should be back in shape for Sunday. All your training is behind you, now it's just putting the plan in action!