I've found myself using Google earth a lot lately. It is better for some spots than others. It is great for the two places I hunt the most.
I know (thought I knew) these two leases really well until I studied them some on Google earth. My on the ground perspective was somewhat skewed, I got a much better feel for the relative hot hunting spots using google earth.
On these two leases Google earth did a bang up job of surveying all the roads, some not much more than trails. Really seemed to clarify my overview of the whole area.