I usually try to get them to go without scaring them too bad,, I dont want them to be nervous about the spot later.. I have thrown small things at them, but then you have to find it when you get down, I have shined a flashlight on the ground near them and moved it around so they see it, but they got pretty nervous about that. One time I started to rustle some limbs and leaves up in the tree, but it took a while for them to leave. Howling like a coyote works too, but they say it seems to spook them a little. A hunting buddy of mine was trying to get a couple dies out from under his stand one evening, and they just wouldnt go, so he took his seat cushion and tied it to his pull up rope, and lowered it down and was swinging it around hitting them with it,,, he said they decided to go n then..lol