The average house loses up to 20% of it's heat or air conditioning from leaky ducts and drafts from windows and doors. If sealed, you could save 30% on your utility bills.

Use ENERGYSTAR Appliances

Energystar products can save up to 20% a year to run. Go to Energystar.gov for more information.
Photo source: http://www.energystar.gov/
index.cfm?c=clotheswash.pr_clothes_washers
 

Use Thick Insulation

You will save energy costs if your home's insulation is at least 6 inches, or your heating/cooling systems are less than 10 years old.

Unplug Small Devices

Unplugging chargers, small appliances and devices when not using them can save 5% of your energy bill.

• Use CFL or LED lightbulbs

• Install low-flow showerheads and faucet aerators

•  Start a compost pile

• Plant trees

• Insulate hot water heater

• Weatherstrip and caulk doors and windows

• Collect rainwater to water plants

• Paint with low -or no- VOC paint

• Replace filters

• Install a programmable thermostat

• Plant a rain garden

• Plant native plants

• Place appliances or office equipment on powerstrips to reduce "phantom" load

• Install motion sensors in offices and other commin areas to turn off lights when not in use

• Install water-efficient restroom fixtures

• Take advantage of daylighting

• Provide recycling bins

• Conduct an energy audit

• Tune up HVAC

• Replace carpet with no-VOCs

• Replace hardwood flooring with bamboo or  cork floors

• Install a tankless hot water heater

• Insulate attic and other areas

• Consider drought-resistant landscaping

• Install engineered window shading to manage heat loss or gain in commercial buildings

• Buy recycled office products and equipment

• Hire a consultant to conduct an assessment of lighting and heating and cooling systems for potential building upgrades and retrofits

• Provide a bike room to encourage environmentally friendly commuting

• Buy ENERGYSTAR appliances

• Replace windows with double pane, low-e models

• Replace roof with reusable/recyclable materials

• Install solar photovoltaic panels

• Remodel kitchen or bathroom with sustainable materials and features

• Replace cabinets with sustainably harvested wood and low-VOC finishes

• Install a solar hot water heater

• Install a green roof

• Implement super energy efficient transformers

• Use wind turbine systems to supplement common area electricity

• Implement a water reclamation system

• Consider anaerobic digesters that use food waste and solid human waste to produce methane and generate power