Using mulch is one of the easiest way to protect plants, stop weeds and insulate soil. There are many options available: besides the dead leaves and grass clippings you can collect from your own yard, check with local agricultural businesses and local governments to see if they have waste material to give away. Ask for chippable bark, salt marsh hay, prairie hay, pine straw, wheat straw, pecan shells, peanut shells, or cotton burrs or hulls.