
If setting is essential--or even just a good/semi-important addition--to your plot, Google Earth can tell you what places are residential, what are commercial, what are unoccupied, you can find out what kind of houses in different areas and what the walk between two buildings actually looks like. You can locate restaurants and see pictures by other users.

When I was writing Rain, one of the scenes I utilized Google Earth for the most was a scene at Goodwill Bridge. Google Earth gave me the location and people had posted pictures/panoramas of the view from the bridge at night and during the day. (I even made a wax picture thing in art class of the night panorama.)
If you don't have Google Earth, and plan to set your story someplace on Earth, get it. GET IT.
Kieryn
www.kierynnicolas.com