Want to cut down on home energy bills? First, inspect your home for ways to save. Look for air leaks around windows, doors, outlets, and junctures of the walls and ceilings. Check insulation levels. Inspect heating and cooling systems. Examine home lighting. Keep a list and prioritize upgrades. A professional auditor has tools such as high-tech fans and infrared cameras for thorough air-tightness and heat-loss analyses. The professional route may cost several hundred dollars, but could identify ways to save big in the long run, paying for itself time and again.