Maps for travel
If you know your destination in advance, you can use the various mapping services with the help of search engines . Print out directions from the starting point to the destination, step by step, and also print out the associated map.
One of the most popular mapping services is Google Maps
http://maps.google.com/
The main problem with using online maps and with other computerized solutions is these systems are calculating distances from maps. They are not aware of one-way streets, no left turns, roads that are under construction, etc. so you have to be able to understand where to go when the map tells you to make an illegal or impossible turn.
For getting cheap maps you can join an auto club. If you have a gasoline credit card, that chain probably has some kind of travel club. The premier association for auto owners in the USA is the American Automobile Association.
The website of American Automobile Association is http://www.aaa.com/
You only pay one annual fee and get a number of services at little or no additional fees. One of them is the map service in advance of a trip. They know where there is road construction going on. They also know where a traveler can get the best gas prices. If you have pets, children, elderly in wheelchair traveling with you, they know their needs and where they can be best served. They know the fastest route between 2 places, the most scenic route. You tell them your needs, and they provide you the information at no cost, other than the annual membership. If you run into trouble on your journey and need roadside assistance, the American Automobile Association can help.