A trick I have just discovered is to revisit a previous bad experience and reimagine it as a cartoon or some kind of humorous event. For example, if the experience was with a person who put you down or rejected you, imagine the person as a walking turd with all the physical properties of a turd. Or imagine the person with huge ears twice as big as their head. It might sound nuts, but my mental effect of the situation changed when I did this. Maybe it wont’ last, I’m not sure yet.
However, I have tried applying it to current difficult situations and it just makes me laugh inside. Maybe it’s weird, but I like it. I’m going to play with it. Weird is also more fun than constant seriousness which I bet raises my cortisol levels and shortens lifespan.