im sitting in a stand 2 hours in the morning and 2 hours in the evening, other then that im stalking but if your opening cans of coke ,your far from being able to stalk deer.You should have no food or drinks other then possibly water.You should be decented and your background should break up your body's outline,moving as little as possible.
Wow, you have more self-control than I do. I am out there from dark to dark and I just can't go that long without eating or drinking something, though if I were stalking I wouldn't be eating. When I am sitting in a blind, I try to minimize movement and keep it lower than the windows. This has worked over the years as I still see plenty of deer.