Picked this tip up on MarthaStewart.com - had no idea that you were supposed to snap up clothes before laundering..... Here is her advice for longer lasting clothes, and coincidentally lower utility costs.
prepare your clothes for the washer by closing zippers, fastening hooks, and turning items inside out. Wash darks together using the cold-water cycle so they don't bleed onto lighter clothes -- and cold water is crucial, since it lowers your water-heating costs. Line-drying dark items will also help maintain their original appearance -- and you'll save on heating costs of the dryer.