Make sure you have no standing water anywhere in your yard. Even a discarded coke can in the bushes could be a breeding ground for them. If you do have any areas and you can't get rid of the water, they make Mosquito dunks you can toss in the water to kill them.
I have used mosquito authority this season. Their website is bugbites.com
Great service, no mosquito's, safe for kids and pets.
I live in SC. They even add some stuff I think to get rid of the no-see-ums.