I always make sure whenever I leave for somewhere, home, work, wherever, that i have my wallet, keys and phone. I do this mental checklist each morning which includes these things, as well as brushing my teeth, putting on deoderant, wearing a belt. I do this once I've got them all I know I'm good to go. It's annoying to do, makes me feel weird that i do this, but i guess I never forget to put on a belt this way, IDK.
Welp, getting ready to leave work, better make sure I still have my wallet and keys.