This is something I recall from reading a magazine article several years ago. It's a practice that apparently helps me to cope. Just as the title says, it's to use suicide as a fantasy. In other words, if you suffer overwhelming stress or hopelessness, you could try fantasizing that you will commit suicide tomorrow. In other words, you really won't commit suicide but just fantasize. The point is that just fantasizing can do a lot to relieve stress. Alternatively, another fantasy you could use is that you fantasize that you will have a fatal heart attack tomorrow which will kill you. Just that thought alone can make you happy for the present day. After all, Nobody knows when he'll die. So it's possible you will die tomorrow for real, so that realization makes it feel convincing that you'll really die tomorrow. So as you can see, even just fantasizing about one's own impending death can actually prevent your death. Yes, suicidal thoughts can actually save your life if you use it constructively.