I have a decoy I made this year but haven't had a chance to use it. If you are in an area with a dominant buck, keeping the antlers on and using dominant buck scent and agression calls should bring the big boy in to chase off the intruder.
If you are not sure about a dominant buck, remove the antlers and use estrus doe scent to attract any bucks in the area. Be warned that estrus doe scent will usually run off any other does in the area...at least in my experience.
I'm hoping to use my decoy next weekend. By then, the pre-rut should be in full swing in our area. Pat