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.
the most hand held thing I carry around is my smartphone or ipad these days. If I’m traveling then a laptop.
My switch has some joycon drift that infuriates me to bring it with me when I travel. I used to bring my DS and GBA with me, but then I was told to watch my surrounding areas when im traveling instead of gaming.