Wow. Even when you posted - not a lot of time. At this point, I'd say to just relax. Take tonight off, don't even think about the test. Cramming won't do you any good; it'll just undermine your confidence.
If it makes you feel better, I worked through the PR and Kaplan
books. The highest I scored on the Kaplan
practice tests was 590; I think I got a 670 on the PR practice exams.
The day of my actual test, though, I pulled off a 710.
Just be calm, don't fret over questions you've already completed, and remember to breathe.