I love to draw maps but don't have the time to hand draw much anymore so I go looking for inspiration. One of my biggest inspirations is our very own little planet earth. What I do is find an interesting area and either mapquest or google map it and then do some print screens and a little cut and paste into MS Paint until I come up with something like this.

For me interesting maps include water and varied coastlines. Lots of jagged coast with peninsulas and inlets. Usually the final map won't be just what you see above but will be modified in areas according to my tastes.
And with the sorry state of geography education in this country these days, none of the players will know they are really adventuring in Michigan.
Well, except Vreck.