First thing is you have to be where there are coyotes. Next you have to have enough open area to see them coming whether it be daylight or dark. If you are hearing them and have a general idea of where they are denning or hanging out, then you want to try and set up with the sun at your back and the wind should be crossing or in your face. It's hard to get them to come in with the wind, crossing wind is better. Be sure to watch down wind as this is where they would most like to approach. If you are hunting in the daylight, use full camo especially face and hands and sit STILL. If you are hunting at night, use a red light and keep scanning the with light the whole time you are set. Keep your movement to an abosulte minimum. It is very important to slip into your area quitely with no talking or noisey gear. I would park at least 200 yds away from where you are going to call, 400 would be better. It is possible to call one to your vehical but you will be decreasing your chances if you start this way. Prime time will be at night if you have the right set up, or the first couple hours of daylight would be next. They can be called at any hour but your efforts will be better spent if you call at peak times. There is no right or wrong answer to how long to run the call. If you get lucky, one will come in in less than 3 minutes but it can take 15-20 minutes. If your call has coyote pup distress sounds, end your set with 5 minutes of it. Stay focussed, keep scanning with your eyes. Coyotes are sharp they will bust you if you move or your attire is shinny and out of place. A decoy can be helpful but just like turkey hunting, won't always work. Experience is the best teacher. Keep calling and good luck. It is much harder in the east than out west, but the calls do work in the east, they are just harder see coming in.