I hunt food sources I know does frequent. If there are does, there will be bucks. I also make sure to stay vigilant and have my muzzleloader or crossbow ready to shoot at a moment's notice. Don't have your weapon leaning against a tree, or against the blind, or hanging on a hook. Have it in your hands/lap. Of all the bucks I've killed during the rut, I'm willing to bet most of them were shot within 10 to 15 seconds of when I first saw them.