Instead of shopping, if you’re not working already, why don’t you go into work: there won’t be anyone there.
Or if that doesn’t appeal, maybe find a local rec center or gym and shoot some ball: take a friend, as it’ll likely be rather quiet today.
Or spend time with family, relax, enjoy the weather if it’s nice, take some naps, maybe eat a turkey sandwich (with the mayo and cranberry sauce and maybe a bit of greenbean casserole on some cheap white bread=YUM), whatever you do, just don’t buy anything.
iPhone 5, built in camera app, processed in Filterstorm.