This list of organic, compostable materials is pretty extensive, but these commonly found and used items will get you started: fruit scraps, vegetable scraps, peels, skins, husks, cornstalks, corn silk, coffee grounds, coffee filters, egg shells, brown paper, grass clippings, yard waste, saw dust, hay, peat moss, roots, seed heads, conifer needles, hulls, nut shells, leaves, wood chips, ashes, straw, manure, seaweed, hair, feathers, blood meal, bone meal, alfalfa, hops, ground seashells