Switch 3 lights that you use for 4 hours a day with compact fluorescent bulbs.

Air-dry your clothes in the spring and summer instead of using the dryer.

Replace a standard-tank natural gas water heater with one that provides on-demand heating.

Go from 500 sheets of 0% recycled computer to 200 sheets of 100% recycled paper.

Drive less aggressively -- don't accelerate and brake rapidly.

Drive the speed limit.

Carpool, take public transit, or telecommute one day per week instead of driving to work.

Go meatless for one meal each week.

Go meatless for one day each week.

Recycle all steel ("tin") cans, aluminum cans, and glass containers.

Recycle all steel ("tin") cans in your garbage.

Recycle all aluminum cans in your garbage.

Recycle all glass containers in your garbage.

Buy organic foods.

Use a washable mug for your morning coffee instead of a Styrofoam cup.

Get a reusable water bottle instead of disposables.

Buy products in the largest size you can use to avoid excess packaging.

Use washable plates and utensils for takeout dinners and parties instead of paper and plastic goods.

Buy vintage clothes instead of new stuff at the mall.

Unplug electronics when you're not using them.

Turn out the light when you leave the room.

Shut down your computer and peripherals each night.

Run the clothes washer with only full loads.

Wash your clothes in cold water.

Run the dishwasher with only full loads and let dishes air-dry,

Take showers instead of baths.

Take shorter showers.