Sort laundry into lights & darks, then into fabric heft. Lighter fabrics (like dress shirts) in one pile and heavier fabrics (like jeans & sweatshirts) into another. Sort towels & bed linens into another pile. Use warm water for whites (not hot) and cold water for colours. Wash linens, towels, undies, socks & gym clothes in hot water. Beware hot water fades colours from clothes. Fill washing machine with water. While the machine is filling, add detergent.