When I’m stressed, I like to soak a washing cloth in hot water and then press it on my face with both hands, covering eyes and nose and slowly and deeply breathe through it. I don’t know why I find almost waterboarding myself comforting but it’s incredibly relaxing.
Also, lying on the floor in the middle of my apartment.
Also: cleaning. I’ve had flatmates who managed to take the same time for cleaning the bathroom or the kitchen and yet it somehow still wasn’t clean.