For what it's worth, rubber band snapping is a pretty popular thought-stopping technique in CBT for dealing with obsessive-type behaviors, though I believe there's some debate over how effective it is. I know it's been used to address morbid jealousy, though I don't know to what extent or if more scientific studies have been conducted.
This thread is for the discussion of Less Wrong topics that have not appeared in recent posts. If a discussion gets unwieldy, celebrate by turning it into a top-level post.
July Part 1