Re-use the plastic bags you bring home from the supermarket to line your garbage pail. You'll save money on buying trash bags.
Don't throw away the Velcro ties that come tied to the vegetables. They can be used to tie the appliance cords or an unruly plant without damaging them.
Use frozen berries or grapes instead of ice in your wine and other liquor. They keep your beverage cold without diluting them and they'll look very decorative in the glass.