I use Google Earth and a GPS...if you zoom in far enough, Google Earth goes into terrain following mode...like flying over the area in a helicopter...you can actually "see" the contours of the terrain...zoom back out when you find an area (like a saddle or bench) that you would like to investigate, get the latitude/longitude and input it in a GPS...then go and actually scout...take notes / pictures...you can create flags in Google Earth (and save them on your computer) that you can make notes on...
I have used this method for several years for hunting Fort Knox military base...though scouting is very limited...it still gives me some guidance as to where to go for an early set-up before dark on opening day...