I'm sorry I'm just getting to your post now; I've been on vacation since 15 Dec.
The final 10 days should be primarily about review, not about trying to learn a lot of new things. Solidify your strengths. Acknowledge your weaknesses so that it's easier to let go if you get something that's just too hard for you in that area.
Take a final practice test about 7 days before the real test. Review that test thoroughly to determine what to keep doing the same way and what to change; here's an article to help with that analysis:
http://www.beatthegmat.com/a/2009/09/23/evaluating-your-practice-testsAs I said, know that you're not going to make any major changes in the final 7 days. Fix any minor problems that you can fix. If you have any major problems that might prevent you from getting your goal score, then you may have to consider postponing the official test. (It doesn't sound like that's the case for you; you've been scoring very well on your practice tests.)
2 days before the test, don't do more than 2-3 hours of review and light practice. The day before, don't do more than 1-2 hours of review. If you have made flash cards, these are great to study for the last few days. (You're not going to learn much at this point, and you don't want to risk burning yourself out.)
The night before, get everything ready: ID, money, food, drink, whatever else you want to bring.
On the morning of the test, do some VERY easy practice problems in one of your strong areas. Don't check the answers. (This is the equivalent of jogging around the track to warm up before the big game. Don't risk injuring yourself. :)
DO NOT bring practice questions or notes into the test center with you - not even in your locker. We recently had a student whose test was cancelled because he was accused of looking at notes from his locker on the break (this is not allowed). He said he wasn't actually looking at them - they were just in his locker - but they still cancelled his test.
Good luck - let us know how it goes!