Not the prettiest thing in the world, but:
Get a cheap box fan, cheap mosquito netting type material, and duct-tape.
Cut the netting to size and tape it to the fan so that anything that goes through the fan gets caught in the net.
Put it in shaded places - bonus if its around doors.
Mosquitoes are not strong flyers, and when hunting or looking for a place to rest will get sucked in and can't get out.
I've killed - without exaggeration - thousands doing this.
Not a silver bullet (what is?) but as part of a defense-in-depth strategy this is insanely easy - and kind of fun.
n.b. I've been hospitalized with west nile - this is fun :-)
This is absolutely the way. And mosquito weather tends to be fan weather anyway!
Works pretty well for ventilating enclosed spaces, too—just make sure the fan points inward, pumping positive pressure into the space, so there’s a steady outward flow from the rest of the door/window/whatever.