I have an E-caller that is now collecting dust. I recently bought a few mount blown callers that have done very well for me. I am not by any means a Great caller, but I think just making noise with these is giving me the best luck by far. By a cheap, variable pitch, mouth blown caller and play with it. Try to simulate something that is dying. Doesn't have to be exactly like a rabbit or whatever, just 10-12 short bursts of waaaa and taper off. See what happens and go from there. I usually repeat every minute or so until I see a yote.