Reading. Notes. Questions. Math. French. French essay. French project. Haiku en Francais. Load of other French stuff. Essay re-write. Pages and pages of bio stuffs.
Then don't do anything. Except sleep. Go to bed right now. The SAT's aren't a test of knowledge, they're a test of how you take tests, and ENDURANCE. You want to be wide awake and rested when you take them, that's the best you can really do.