Agreed that you have to read the deer to make a decision.

Whenever I set up a ground blind or a treestand, I ALWAYS have a designated draw area. I assume I know where the deer are coming from, and if they play their part, I have a spot that I know ahead of time is my draw spot. If its in a tree, many times I will cut extra oak limbs full of leaves and hang in front of me to give me additional screening for my draw spot. Thinking all these things through before the deer is there greatly ups your odds.