15. Furnace, Boiler Checkup
Hire an independent HVAC contractor instead of the oil company to change the filters and clean soot from your oil-burning furnace or boiler each year. Either way, you'll get a tune-up that could yield a 5 to 15 percent savings compared with untuned equipment.
The payoff: Some oil companies may set up your equipment to use more oil than is needed in order to bolster their business (selling oil). By using an efficiency-minded independent, you could see another 5 to 10 percent in savings.