Give Your Attic Insulation an Upgrade
You can save as much as twenty percent on your heating bills just by adding insulation to your attic.  The higher the “R” value of the insulation the greater the savings you can expect to receive.  You should use insulation with at least an R value of 40 when insulating your attic.  You can also reduce you energy costs by applying a good sealant to your attic door.

Seal Your Air Ducts
Around 40% of the cooling of your home is lost as the result of leaky air ducts.  The air ducts in any home tend to be very warm, making your energy costs rise during warm weather.  Do not use duct tape to seal your duct system.  It is better to use mastic and mesh combined with insulation with an R value of at least 8.

Clean Air Filters
Air conditioning and furnace filters should be replaced monthly to operate at maximum energy efficiency.  These appliances work harder, and therefore use more energy, when they have a dirty filter.