Relax. Don't get too worked up about it. It is exciting to get your license, but don't let that distract you from your test. When I took my behind the wheel test about a year and a half ago it only lasted 5 minutes and all I did was drive through a neighborhood, on a semi-busy road and park in the lot. I thought I failed but I didn't. So it may be different depending on where you live but don't let the license distract you! Good luck!
show the instructor how confident you are by moving your head when looking not just your eyes. you've kind of got to exaggerate in front of the instructor (when it comes to how often you check mirrors and stuff like that.) if you hit anything at all, you just failed. do your best w/ parallel parking and 90 degree turns, but you don't necessarily have to get that entirely right (points off if you don't, though). if you were really really eager to pass the first time you could check this out. http://roadtesthelp.netau.net/