I always have a diaphragm call in my mouth when calling. It's great for stopping coyotes, especially after you drop the first one and are lining up another.
I also have a Primos Catnip tucked in my bino harness. Thats been really handy for situations where you spot a coyote walking into or out of a stand, and you don't have the time and / or the cover to set up an ecaller.