Get blown. If everybody in this country kept their tires properly inflated (and studies show many don't), gasoline use nationwide would come down 2 percent that's a savings of 2.8 billion gallons a year!

Ride it! Your bike, that is. It's good for the environment and your health. If you like doing it with a lot of people, consider walking, carpooling and public transit. You'll enjoy it and so will they.

Wanna go all the way? Do it responsibly. If you're buying a car, pick the least-polluting, most efficient one that meets your needs. Maybe it's a hybrid. Or maybe it's a wagon instead of an SUV. Over the average lifetime of an American car, a 40-mpg car will save roughly $3,000 in fuel costs compared with a 20-mpg car.

Let someone get in there with some tools. A tune-up could boost your miles per gallon anywhere from 4 to 40 percent. A new air filter could get you 10 percent more miles per gallon. Somewhere downtown in a dark garage there's a greasy guy in a jumpsuit who wants to help.

For more tips like these, head to the Natural Resources Defense Council's itsyournature.org.