I have to agree that knowing the land is a key factor. One way to get to know the land is just walk it in the off season. For instance here in Wisconsin now it's cold the birds aren't gobbling and are bunched up in winter flocks. But it is a great time to get out and learn the lay of the land in new areas, or areas you hunted last year and had a gobbler hang up but cuoldnt figure why. While turkey habits change the lay of the land usually does not.