Tip #1 For the decoys that are a little faded go to Wal Mart and get a can of flat white spray paint for a buck and lightly mist the small patches of white just behind the decoys leg. You can also touch up the tail feathers a bit. This quick and inexpensive tip can really add visibility to your spread. How many times have you watched a raft of ducks bobbing up and down on the water and seen those white flashes from the birds?
Tip#2 In clear water try using 40 lb. test mono. for decoy line. It may sound kinda dumb but I am a firm believer that gun shy ducks can see those dark decoy strings in clear water going to every decoy in the sread and be spooked.
Tip #3 Late in the season if the birds have been pressured alot and there are alot of hunters out leave the mojo back in the truck and down size your decoy spread. Everybody and their grandfather uses a mojo or robo duck and about the same number of decoys and the ducks learn this. Its called the association factor. After the birds are shot at over and over by hunters using the mojo's the ducks associate the spinning decoy with danger. At least thats what I have seen in my neck of the woods.
Tip #4 Take a dump BEFORE you head out to the blind.