Smells
I would use some sort of smell somewhere in front of you. if it's before the rut, use a doe or buck urine smell and spray it on some leaves in 3-4 places in front of your stand about 20 yds away. Deer have UNBELIEVABLE smelling senses and they will pick up on it. if it's during the rut, spray some estrus scent but I wouldn't do as many places with it. When that's all that's on the buck's mind, he'll find that one place. Grunting works to get them to stop, but you had better be ready to let the arrow fly within a second after you make a sound- just to be safe!