I think the most important skill is probably knowledge. You have to have knowledge of the deer in the area, the terrain, the best method of hunting, how to be quiet and stay quiet and undected (scent and sight), know when to move when to stay put, and most of all COMMON SENSE. Don't hunt where it looks good and you can see forever. Have the self-discipline to get in the brush, sticks, thick stuff. The less you can see, the greater your chances are of seeing something.
My Dad always tells me persistence, patience, and confidence. Those are good things, too.