Select the correct water level for the size of the load. Because your washer uses most of its energy heating the water, cold-water washing saves a substantial amount of energy. Use the coolest water temperature appropriate for the fabrics and soil conditions. And always use cold water for rinses. Presoak or use a soak cycle when washing heavily-soiled clothes.
Lightweight items take less time to dry.
Fill the dryer. It's more efficient to dry a full load than a small load. Excessive drying will wear your clothes out and may cause shrinkage and wrinkling. Using your dryer's automatic cycle prevents overdrying and saves energy costs incurred by unnecessary drying and ironing. Dry several laundry loads consecutively to maintain the temperature and take advantage of heat built up in the dryer.