This isn't for everyone I know, but I like to review my budget. I made a google sheet of my expenses vs my income. Having a clear plan really does calm my nerves.
Go on walk
I know you probably hear it a lot.. but going on a walk really can make a fascinating difference.
Play a video game
There is such a wide diversity of video games out there. Calming exploratory games, puzzle games, combat, story, single or multiplayer, etc. Once I get in touch with the need that is alive in me it’s fun to look for a game or game genre that might tend specifically to that.