Ooh, that's really cool, Taxis.
p-dragon, I personally find (and have had mentors teach me) that it is a good idea to have a map for continuity purposes. If your story takes place in a real town, use that. If your story takes place in a fantasy or sci-fi world, or even a made-up town, drawing a map is pretty good.
Also, I find it ridiculously fun. I drew that map for the first time in Grade 7, and have been developing it for two years.