If you haven't already, take practice tests. You can expect your score to drop by about 10% from a practice test with a reasonable sampling of the test bank questions to the real thing. So if you need a 70% on your FAA written, that means that consistently scoring 80s is minimum for a practice test, but build yourself a buffer and make sure you're getting higher. In fact, I usually won't even endorse a student unless they can show me a 90%!
Other than that, just relax, make sure you READ THE QUESTION, the FAA loves to trick you by subtly wording questions that steer you toward a wrong answer. Don't let this intimidate you, any person of average intelligence can pass with flying colors, just be aware.
Good luck and let us know how it goes.