Sometimes I tackle whatever it is that is upsetting me, come out on the "other" side. When I have a bad dream I look at it and analyze it, do other endings, unmask the bad guy, etc. Paying attention to what is upsetting me like bad dreams or ugly/difficult moods often seems to tell my unconscious that I am interested in what it has to say, to learn from it and am listening so it then doesn't have to go to such extremes to get my attention in the future.