How to Overcome Lingering Feelings of Night Terrors?

I once had the same nightmare for months in kindergarten of a strange man attempting to kidnap me and other details I'll spare readers. It happened in some form every night, whether it was a full on nightmare of him or just his face briefly appearing in an unrelated dream. I found that drawing a picture of the man, erasing his face, and then crumbling and tossing the paper in the trash made it mostly stop. There was the rare times I'd see him, but there was never that gripping fear over me anymore. I have since used this method during other times of nightmares that are recurring in characters or themes.