If you plan to photograph Utah or Arizona, then be sure to pick up a copy of the book Photographing the Southwest by Laurent Martres. It comes in two volumes: Volume 1 covers Southern Utah, while Volume 2 covers Arizona. These books show you exactly where to visit to get the best shots and are a must buy for anyone serious about photography.

I consider this to be my bible on what to see/visit/photograph and wish there were volumes on all 50 states.