Is your doormat squishy and virtually useless after a rainstorm? With a fine-tooth handsaw or a jigsaw, cut a piece of 2 x 4-ft. suspended ceiling plastic grid (about $10 at a home center) to fit under your mat. Air will circulate better under the elevated mat and help it dry faster and prevent mold from growing in the fabric. The plastic grid is sturdy and won't break under the heftiest footstep in your neighborhood. To keep mud from getting in your house, consider installing this mud-busting boot scrape.