I do this thing to help myself set an energetic or emotional boundary, particularly when it feels challenging to do. I say, “This isn’t mine.” This is not mine to carry, react to, spiral around, or emotionally labor over when no one has asked me to. (And it’s no help to anyone, anyway; in fact, it’s usually detrimental to all, as well as the cause of self-imposed suffering.) Sometimes when I really need to really emphasize it to myself, I’ll do a whole hand motion thing and even look myself in the mirror and say it. (This is not mine.)
I also heard something recently about how learning to take things less personally is an indicator of personal growth. This feels like part of that.