When it comes to keeping snow, salt and the resulting dirt out of your house, a good offense is the best defense. Prepare for shoveling by placing guide rods in front of plant beds along the sidewalks and driveway, 1st Class Cleaning says, and stay on top of snowfall by shoveling early and often. Sand helps prevent slippage, but again, be sure to provide a place where dirty shoes and boots can stay before they track dirt throughout the house.