Potential annual savings: $150
While we're on the eco-friendly bandwagon, using compact fluorescent light bulbs saves about $30 in electricity costs over each bulb's lifetime.
But to really impact your bottom line, consider upgrading an old appliance like a refrigerator or dishwasher. Newer energy efficient appliances can save $50 to $150 a year in energy costs, according to Energy Star. NEXT: Go generic