I love coffee – working is actually usually less stressful than school. At least there (usually) isn’t any homework! Unless you’re a teacher, of course.
Mischiefmaker – try some “light” classical music. There’s a CD – Debussy for Daydreamers – that has perfect music for unwinding. I actually recommended it for a friend of mine who had trouble getting to sleep, and it worked for her! Or almost anything by Debussy, for that matter. Take five or ten minutes, turn the music on, close your eyes, and just drift on it. But be sure to turn your cell off first….