Love to groundblind hunt. make them in areas where treestands are impossible to put up, but I know there's deer. Usually I'll make it in the middle of thickets or a hedgerow overlooking a food plot or bedding area(swail). I'll get deep enough into the brush on the edge of field or overlooking a run. I try to be like I'm almost in the middle of a bush, trim an area to put my pop up seat, then I trim around me at the height I'll be when I stand to shoot. I try to make it where the only thing that will ever be exposed is from my shoulders up when I stand to shoot. Other than that, I'm a bush as far as they know. Like the others said, wind direction, scent control, and movement are big factors. Like Taz said, take your first best opportunity to get in position. When they tuck behind a tree or thickets, or whatever that's the time to position. Don't wait to get them as close as you can before you make your move. Make your move first then be still and let them come in.