When something bad happens to me, something that might make me angry or irritated, I say out loud or to myself in faux anger “This is the worst thing thats ever happened to anybody!”
Helps me to put in perspective the trivialities on my own misfortune, to laugh, and to move on, rather than brooding.
When Im having an acute bad time, mentally, normally due to nebulous worries about things or panic-thinking trapped without action or decision, the grounding exercise helps me. Name 5 things you can see, 4 things you can touch, 3 things you can hear, 2 things you can smell, 1 thing you can taste.
Writing in a diary has helped me immensely. People been telling me all my life to do it, but I always found it hard, until I found a tiny pocet book and .05mm pigment pen that I could write really small with. Small writing is my own encryption against other people seen what I wrote, its damn near impossible for me to read it back without a magnifying glass, and the small pocketbook can be carried around anywhere.