Got a fireplace that actually burns things up? If there's a significant amount of ashes to clean out, you can cut down on the mouth-covering and coughing with used coffee grounds, which mix with the ashes into an easy-to-clean whole.
The tip comes from Networx, which claims that the weight and slight dampness of coffee grounds, when sprinkled around a fireplace bottom, makes ashes less likely to fly and easier to clean out. We found the coffee grounds/ash connection in a few other places online too — along with a number of suggestions on making your own long-burning logs out of coffee grounds, so it seems worth at least a try.
Coffee Grounds Keep Dust Down [Networx]