Just keeping the paper isn't a solution, people need to know how to use the back up, and use it regularly. When I delivered pizzas, we had a big paper map of the city that we used to consult for deliveries, drivers quickly learned where nearly all of the streets in the city were and how to get there. For most deliveries, drivers just knew where to go, for the rare times I didn't, I either remembered the main street near my delivery or wrote down some notes on the box. Someone marked new streets on the map, as well as the names of major apartment complexes.

Just having that map on the wall isn't going to do any good since without regular use, no one's going to be able to use it effectively. And it's doubtful that people can be forced into using it.