On the last day of my "making book", my first center manager (who I recently found out was terminated out of another building for fudging numbers) told me "tomorrow, bring a map and a sense of humor". If you know in advance the area you'll be doing, take a ride there on your own time and look around.
Use all the tools at your disposal including a map and a smart phone. Take notes, try to notice trends in street names (i.e., numbered streets, streets named for trees/flowers, streets with male or female names). Also, never be afraid to ask the customers. Many people live close to where they work, they can be a tremendous help.