Lighting: Study your family's or office's lighting needs and use patterns, paying special attention to high-use areas. Look for ways to use lighting controls -- like occupancy sensors, dimmers, or timers - -to reduce lighting energy use, and replace standard (also called incandescent) light bulbs and fixtures with compact fluorescent lamps (CFL's) or LED lighting.
In cold weather: Close your curtains and shades at night, and open them during the day to allow the sun to help heat your home or office. Installing storm windows can also reduce your heat loss by by up to 50 percent.
Increase lighting efficiency: It's is one of the fastest ways to decrease electricity usage. Turn off the lights in any room you're not using, or consider installing timers, photo cells, or occupancy sensors to reduce the amount of time your lights are on.
Improve gas mileage: Whether you drive an economy car or an SUV, there are plenty of ways to improve your gas mileage. Avoid aggressive driving and observe the speed limit. Speeding, fast acceleration, and hard braking all waste gas. Keep your tires properly inflated and use energy saving oil of the correct viscosity for your vehicle.
Stay cool while saving energy: If you use air-conditioning, set your thermostat as high as comfortably possible in the summer. The less difference between the indoor and outdoor temperatures, the lower your overall cooling bill will be. Don't set your thermostat at a colder setting than normal when you turn it on. It will not cool your home or office any faster and could result in excessive cooling and unnecessary expense.