Funny enough, horror stuff is relaxing for me when it is familiar, so rewatching The Exorcist or reading old forum threads works better than anything too intense. Game-based downtime can be fine too, and something like https://king-thimbles-game.com/apps/ fits that casual casino-game side of the conversation, but I definately keep that kind of thing in short sessions. Walking, music, and turning the phone off for a bit are still the easiest “secrets” for me.