Originally Posted by Redsfan320
Actually, I'm still in 10th grade, which is one of my biggest concerns.
Good for you.
Listen to the advice already given (good night sleep, good breakfast, etc) and you'll do fine.
When you get your score back, remember that you've still got 2+ years to (1) learn more, (2) familiarize yourself with the test format, and (3) retake the test & shoot for a better score. Paying attention in school each day is definitely the best way to prepare for the test.
Like with anything else, practice makes perfect. Think I took the SAT a total of 5 times (starting in 7th grade) as well as the ACT twice.