A few things I've learned over the years-take these with a grain of salt because they might work here but might not where you live:
Some species of ducks, wigeons, pintail, redheads, and goldeneyes in particular, really like to land with their own kind. I've had wigeons fly all the way across my decoy spread to land with my wigeon decoys. Others like gadwalls and mallards, and especially shovelers, don't seem to care what species of decoys are out and will land just about anywhere.
I usually run a mix of decoys, mallards, gadwalls, wigeon, and pintails for puddlers because birds around here often group in large rafts. I will often put 3 blobs of decoys in groups with 15-20 yards of open space in between them, that seems to draw the birds into the landing holes.
If I run a jerk cord, I like to run it through a blob of decoys so the ripples will move the other decoys around too.
If I run a spinner (I only run a floater spinner, not one of the ones on a pole) I often like to set it either behind the blind if we are hunting an island or a good 20 or 30 yards away from the other decoys. Not only do you get to shame it for being a spinner by making it sit off by itself, it can draw far-off ducks' attention and get them to key in on your decoy spread.
I rarely run an all-diver spread but I will usually set out a couple of longlines of black-and-white divers that lead into my spread, I've been surprised over the years to see how many ducks will fly straight up the diver line, puddlers and divers both.
One trick I learned with late season geese this year is that if there is ice and open water then resting geese will often sit in a line down the edge of the ice shelf while others sit right off the ice in the water, I had great success this late season by setting a row of shells on the ice edges and putting 5 or 6 goose floaters just off the ice. If you have a few full bodies to mix into the shells on the ice it's a great setup. If I'm specifically targeting geese I will often hide at least 25-30 yards away and off to the side of the goose spread, geese are damn wary and if they aren't looking in your direction it helps a lot.
There's a ton more, I feel like you can hunt for a lifetime and not learn everything there is to know about running decoys. It's what makes it so dang fun!