As longtime readers know, one of my big pet peeves is that we fret a lot about drunk driving (rightfully), while not doing the the rather obvious thing - sufficient late night public transportation, at least on weekends - in most places.
Good public transportation isn't really viable in a lot of places, but at least in the places where it is there should be more late night service. My own local transit authority has, to its credit, made some slight improvements in recent years in this area.