Advice on warlocks?

I have a 68 warlock with mostly blues and a few epics, and i love pvp.
But whenever I look at the DPS charts in bg i can see that im about half down :( whereas other locks, same level, are top of the charts. I am destro specced and hit around 3k on crits. I want to own in pvp but feel like i don't know how to play the class so well.
If I could get a good rotation of what curses to use and how to be a warlock, that would be great,
And how to survive against warriors/rogues, since they are my top fears in bg and can 1 hit me at chance.
Any help?