Hi, sorry I'm just getting to this now, only a few days before your test.
DO NOT do a practice test the day before. You aren't learning much, you'll just tire yourself out for the real thing, and you risk having a bad test experience for some reason (or even just mediocre) and lowering your confidence when you don't have time to do anything about it.
As a rule, don't take a practice test within 5 days of the real thing.
Generally, the closer you get, the less you do and the more high level it is. Overall review of your major strategies (including timing!) and the major content. The day before, don't do more than a couple of hours. You either know it or you don't at that point; don't tire yourself out by trying to cram.
On the day of (and only if you have time, as you do), take up to 30m again to review your MAJOR strategies for things, and also take about 15m to do some
very easy warm-up problems as close as possible to the start time but
before you go into the test center. Don't take any practice problems or notes into the test center. (You're not allowed to look at them on breaks; we had a student once whose score was cancelled because the testing center said he was looking at his notes in his locker, though he said he hadn't been.)
For others who are reading this, here are a couple of articles on what to do for the final 2 weeks:
http://www.beatthegmat.com/mba/2010/08/ ... -game-planhttp://www.beatthegmat.com/mba/2010/08/ ... -to-reviewGood luck - let us know how it goes!