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.
If anyone has had those torturous dark days of unexpected 4 hours stranded, they would understand always carrying like a switch just in case. Even if you dont turn it on more than 20 minutes a week. Its about that one time.