What are some tips for ping my drivers road test?

Tomorrow, I'm taking my road test. I've been putting it off because my birthday was in December (Minnesota winter roads are so unpredictable) and I finally got an appointment. My parents say that my driving has improved so much over the months. And I've practiced 90 degree backing and parallel parking with my dad a few times. I seem to be fine when I do both of them. I'm just so nervous. The examiners that do it in my town are very crabby. My parents think my friends aren't helping much, they're just making my nerves worse. Anyways, what are some tips for ping the test? And what are some ways to just relax? I tend to get all worked up and just fail miserably. And usually, once I've made a mistake, I just get flustered and can't focus on making it right. Help?