This might sound weird but I always like taking a handheld with me when I go to work or go out for a while in general. It helps with my anxiety knowing I can play a game to calm me down even if it’s just for like 20 minutes in the bathroom. My favorites to carry are a 3DS, switch, or vita.
I used to carry around my 3DS for that connecty matchy thing that I don’t remember cause it’s sitting my bedside table for the passed 10~ years.