Get an MPG Meter!

Some great links about hypermiling:
cleanmpg.com
Washington Post Story
Wikipedia Entry

Hypermiling : Ways to decrease your fuel consumption

First (and most important) step: Start recording your gas mileage. Easiest way? Use your trip odometer. Method to check your MPG Second step: Do you drive agressively and not know it? >> The third step: How long are you sitting still at red lights? >> The fourth step: Keeping moving in traffic congestion >> The fifth step: Slowly accelerate after stops >> The sixth step: Your cruise control saves gas (but not by using it they way you might think) Watch your Miles Per Gallon