To start with, don't worry about the course or your grade, at least if you've been working hard and really trying to learn all semester. In my experience it is rare for a student who has worked hard, done their homework, attended lecture and recitation, and done their best to learn the material to fail the course. It is not impossible, but it is very rare. So relax.
Plan out your final exam study schedule - don't just wing it and study until you drop. I'd recommend studying physics at least three hours per day, and at most five, in one or two sessions per day. The two times physics study is likely to be the most effective is mid-morning when you are fully awake and able to really focus and in the evening well after dinner but before you are really tired (say, from 8 to 10 or 9 to 11, depending on your sleep schedule). Mid to late afternoon may be ok depending on your personal rhythms. Avoid studying right after lunch or dinner - a big meal robs the brain of needed blood while it digests and it is difficult to focus.
Organize (if you haven't done so already) physics study groups. Studying in a group (like the recitation groups) is almost certainly going to be less frustrating and more time-efficient than studying alone. At this point, there should be few problems indeed that nobody in a group of four students from our class cannot get between them, but any given student could well be stumped by any given problem.
Stay calm and get plenty of sleep. Sleep actually aids in the formation of long term memory and understanding (not to mention keeping you mentally healthy in other ways. At this point you SHOULDN'T be spending as much time LEARNING the material as you are REVIEWING the material and reminding yourself of how this problem or that problem is solved. If you are one of the few students in the class who really did blow off working honestly on most of the material and is counting on ``learning'' it now in a few 20 hour days of study, you have my profound sympathies as I'm deeply skeptical of your the chances of your strategy succeeding.
The last piece of ``state advice'' I have is to consider drinking a caffienated beverage immediately before the exam (provided that you are not one of those people that overrespond to caffiene). A moderate dose of caffiene (a single cup of coffee or tea or a coke) is known to measurably increase your IQ by about 5-10 points, probably by bringing you to a state of full alertness and postponing mental fatigue. Too much isn't useful, of course - I don't mean to suggest that you drink so much coffee that you come in ``wired''.
You will do your best on the test by far if you can enter the exam room on test day relaxed (with no concern for the results), rested (a good night's sleep and NOT after studying physics all day Monday), alert (after a light meal accompanied by a nice cup of tea or coffee), and possibly in possession of a nice dark chocolate bar (or even two) to fortify your brain an hour or so in - a bit more caffiene-analogue in the chocolate and some sugar to feed those grey cells. No drinks in the exam hall, of course, please - to easy to have a disaster.