Personally what I do is I go outside to take a 10-15 minutes break.
I need to change space and be away from everything for a while.
While I’m outside, I would either talk to a friend about anything, could be your problems,
or I’d sit on a bench, close my eyes and clear my mind.
I also like looking at https://www.reddit.com/r/WritingPrompts/
it’s full of short stories which takes 2-5 minutes to read.
Since you’re on this forum,
you could also look at Memory palaces built to change your mood :
Other then that, I don’t know, meditate?