The skill and knowledge to be able to determine the bedding and feeding habits of mature bucks along with the ability to adapt to the changing feeding habits of the deer population as a whole. The ability to determine travel corridors, funnels and saddles and place stands in strategic locations that will offer the best shot opportunities while minimizing your impact in the area. And the last which is not really a skill, being willing to do the work and put the time in that it takes to be successful.
GO BILL!!!!! HAHAHAHA