WoW PvP Advice? Easy 10 pts?

I have a 63 pally but I just created a DK (now at 59) and need some tips on how to do better in PvP combat. I'm absolutely terrible it at. I could lose to a level 40 just because of the fact that I don't know what I'm doing. I've tried jumping around, but people tend to turn to face my direction immidiatley and I'll be out of range, then i'll be stunned etc. It just doesn't bode well for me. So basically I just need as much help as I can get in terms of pvp. If there are any DK's out there answering this here's a bonus question: What's the best DK rotation to use for an unholy?