If i only got to pick just one then it would definately be #4 (knowledge of hunting area)reason being,I have oviously scouted out the woods(5)and know all i need to know about my area---where the deer are feeding,bedding etc.
Location,location,location(1) is also related to #4 in my books because I know where i want to place my stand in a certain location.
So to sum it all up,location(#1) and scouting(#5)all equals#4----KNOWLEDGE OF YOUR HUNTING AREA