Dress in layers. The exam room may not be the most comfortable temperature, and your needs may change during the very long exam. Give yourself some flexibility to warm up or cool down.
Review CISSP For Dummies. By now, you could write out this book from memory.
Head to the exam room, sit down, and listen to the proctor’s instructions. At this point, you should be confident in your preparation, well rested, and ready to test your knowledge and skills. Good luck!