You-are-here maps are standard aids for newcomers to a complex terrain. A precisely constructed map with a properly affixed you-are-here symbol, however, is not sufficient. Two principles, one of structure matching and one of orientation, must be considered in order to maximize the map's usefulness. Indeed, neglect of these can make the map misleading. These principles lead to the following set of recommendations: (1) provide salient, coordinate labels in both the terrain and the map; (2) place the map near an asymmetrical part of the terrain; (3) design the you-are-here symbol to indicate map-terrain correspondence; (4) align the map with the terrain; (5) be redundant, that is, use as many of these supplements as possible.