How do you deal with nightmares?

I've finally got my PTSD symptoms back under control (for the most part) after being re-victimized again at Christmas. But the damn nightmares...ugh. They haven't gotten any better. I was looking up some stuff and found articles about Imagery Rehearsal Therapy. Gonna talk to my psychologist about it when I see them next. Has anyone else tried IRT for their nightmares? How did it work out for you? Any other techniques any of you have tried that have lessened or gotten rid of your nightmares?