day 1 - we air-dry our clothes.
day 2 - we compost grass trimmings.
day 3 - our family of four only has one vehicle.
day 4 - we "maintain" a yard of weeds rather than grass. i know you're thinking this is just a laziness or skill issue (and maybe it is) but having weeds (that this fall, we figured out will self-seed if left long enough without mowing) require no water or fertilizer. thus, this saves on water AND prevents unnecessary over-washing of fertilizer into ditches, creeks, and rivers. we used to think that we wanted grass. but, i think we've decided that weeds are just fine. it looks green - and is only ugly when you get up close to it. :)