I've been getting better with the more experience I've been picking up.

The big thing for me is "spots". Finding productive areas you can hunt, that are close together that allow you to string together a "hunt" helps a lot. Also, take care setting up. Making to much noise setting up will bust you.. and if you can find a partner and have them set up at least 50 yards downwind, you'll do better. They love to circle down wind and you'll be amazed at how many you actually call in but they wind you long before you ever saw them.

Water... I have had my best coyote success near waterways for some reason. I've even shot 2 on the ice itself as they used frozen streams/rivers to come in.

I seem to average 6 "sets" per success if that helps. You may go on a good or poor run every once in awhile, but it seems to average out to 1 per 6 for me at least.