Just a reminder, if you're going to engage in PvP, be sure to quickly make use of the PvP notification command.
All you have to do is type in:
Quote/c pvp
And press enter.
Even if you're in a situation where DM supervision is not required for PvP (for example, in the wilds or an NPC-less area, during friendly spars), using the command is a good idea because then us DMs can watch the action from the beginning with a bucket of popcorn in hand.
You can enter this as a macro on your quickbar if you're as lazy as I am.