When I ride a bus or train (whether it's for a school trip, a city bus, commuter rail or whatever) I just look out the window and ignore everyone on it. And no, I've never missed my stop because on rail, I go from terminus to terminus. (Kind of hard to miss your stop then.) And on bus, it's usually a school trip, so when everyone else gets off, so do I. Aside from that, I look out the window, at the roads and scenery. Helps that I'm a bit of a roadgeek.