A mojo dove is awesome.....IF you are in a field with few shooters or NO shooters directly across from you. At times the mojo works so well all the shots will be at birds 6 feet off the ground offering no shots if you are in a field with others due to shooting low birds.
Dove decoys are great! Buy a decoy with a hole on top and take a fishing reel and tie the line to the decoy. Use fishing pole to throw decoy over a power line and let the weight of the fishing pole keep the decoy snug against the bottom of the line. It kinda looks wierd with the decoy sitting under the line, but to a dove, its like crack. All you need is one or two, but one works fine.
I never had much luck putting them in trees, on the ground or on low fences, but if you can get'em on a power line, you will pull about every bird to your location.