Returning from a weekend excursion, I found the GPS a useful tool in locating coffee shops. Any Garmin, Tom Tom, GPS device, or smartphone with GPS capability that can search for POI's (points of interest) will work.
Using the "Search for nearby POI" in the Tom Tom, I typed in "coffee," yielding five or more cafes to visit: all of them being local and non-chain stores. Remember: By typing in coffee, the search will only come back with "coffee" in the business's title, skipping places without coffee in the title. By searching and visiting local coffee shops, it added a nice break from a 3-4 hour road trip, allowing us to visit an off-beat, local cafe. The actual place we visited was a bit disappointing. The espresso was lukewarm! They should have read my espresso cups post, specifically heating up the cups before espresso is brewed. Doing a GPS visit, one may have duds, but for all the duds one quality cafe will be worth the detour.
If one doesn't have a GPS, using Google Maps and searching for coffees places before embarking on a road trip can act as a stand-in.