I'll add my experiences here too.
As a former DJ, I play music just for me. Hunt down new tracks on Beatport or digging through the treasure chest of SoundCloud. Music is the door to my heart and my brain. I can spend ours and get lost for real, but it's also a very costly 'distraction' or sometimes not possible due to other activities/appointments.
I play games. RTS games when I need a full escape from work. Focusing on build orders, attack timings, scout patterns, and tech upgrades while dealing with different opponents to forget about work entirely; otherwise, I lose hardly and get 'owned' by anyone. Racing games when I don't want to escape from work altogether but still want to forget about some situations or colleagues. Racing games aren't complicated, just visual recognition and repeating of steering controls. Easy to keep in mind some details about work but distracting enough to forget weaker details. RPG games or MOBA games when I have no concrete plan of getting lost in work details. RPG's and MOBA's allow me to jump in quickly and stop playing minutes later or jump in for a whole weekend and forget about anything that happened at work or in a project - sometimes I don't care.
I go out for a jog and run at least one hour. While fighting the pain in the lung, I spent no time on thinking about work. But sometimes I find personal excuses too easy for not going out today.
Enjoy a new movie at the theaters. Meet with friends and come together to remember good old times; happens rarely. Talking with good friends about work may help to sort things out and see things from a different perspective.
Just a few times a year I get addicted to TV series or movies on Netflix, Amazon Prime, Apple TV. Sometimes I also occasionally watch streams on Twitch and follow how 'pros' play the same game as I. It doesn't help much when I'm stressed at work but it helps not getting stressed too much at times when situations change from easy going to due date chasing.