Use Recycled Toilet Paper (no! not used!): Because: if every household used recycled paper we would save 1 MILLION trees.
Keep your freezer's temperature at o* F: and your refrigerator between 35* and 38*. Because: Adjusting a too-cold freezer by five degrees can cut it's energy use by 20 percent. (That's a lot, plus your refrigerator will last longer. )