She was staring at you because she knew you were there!! Normally when that happens it's too late to do anything. I draw when they are not focusing on me, I try to draw when they face away or walk behind a tree or any other obstruction. When hunting a feeder I draw when the reach down for corn.
I'm hunting Oklahoma next week, no feeder. I'll make a ground blind that I can see out, I'll draw before the cross my shooting lane. It all depends on the circumstance, the more you hunt the more you'll learn. Don't be afraid to let try different things, this is the only way to learn.