I usually set the caller 10-50 yards out, but it depends on the terrain and approach. You can be busted trying to set it too far from you. 1 step too far is worse than stopping a 100 yards back.
I usually let it run continuous or close to that with prey sounds. Coyote sounds are used much more sparingly.
Set up downwind or crosswind from the caller to try catching those that circle to catch the wind coming from where they know the sound is.
Do your best to put the approaching animal at the disadvantage. Sun in their eyes, your outline broken up, wind right, good view downwind, and have a pre-planned spot to set up. Wandering around looking for just the right spot to sit never works out very well.
