I know it's not healthy at all, but when I feel really down I think "well, I can always end it all". I am a coward so I don't think I'll ever do it but the thoughts of being free from emotionnal pain is very soothing. It makes me feel like there is hope and there is a solution. That way I can tell myself "the next week is a free trial of life, I can always backdown then". And I repeat this every week. 

To be clear : I never had a plan, I am not currently thinking about ending it all.