Any remedies for getting rid of flies?

I got one of the 12" wide sticky paper traps that's on a roll that were sold at Tractor Supply. It's what you'd see at a stable. When the flies got really bad here, I hung one up by the back door, because I swear they were waiting for the door to open, and half a dozen would come in. They are really bad around this time of year, but I haven't had to get one yet. Seems like cutting down a lot of the crap on the side of the fence has reduced them somewhat.