One of the easiest ways to tidy up your yard and save water is to use mulch around your landscaping. Mulch locks in moisture and also blocks light, which helps prevent weeds from germinating. But buying bags of mulch at the home-improvement store can be expensive. One way to get free mulch is to contact your local municipality about yard waste centers. These centers collect yard waste from residents and turn it into mulch and compost. Throughout the year, they often give away mulch and compost to residents. Just bring your own tools, and load it up for free.