I have a warlock alt on a PvP server. One of the interesting/annoying things about warlocks is that if you are killed in world PvP, you will almost always have your corpse camped.
Why? Because they know you have a soulstone. They are just waiting for you to resurrect, and they'll kill you again. You can't even release and run back, because they'll still be waiting at your body. It becomes a waiting game between them and the release timer.
So what does a warlock do? Personally, I minimize WoW, open a web browser, and make a blog entry.