I started out with hand calls, then switched to a cassette player with a loud speaker attached to it. I'll admit, it sure was nice not blowing your lungs out trying to call in a fox or coyote....especially after I'd been on the 3rd or 4th stand. 
These days, I don't leave the house without my Icotec caller and a MOJO Critter motion decoy.
I've set up the e-caller and motion decoy at a crosswind, 70 yards from the edge of the woods and 80 yards from my location....and it works like a charm. Hard to argue with success!
Plus, it's very entertaining, when they run straight to the decoy, slam on the brakes about 10' from it and realize the jig is up, like this guy. 

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