A web site you can track your cars MPG and compare it to others.
GasSavers.org is kind of a cool web site. You can record your gas mileage there (you enter the date, amount of gas, and miles drive), and compare to others who have a car similar to yours.
But beware, lots of the folks there are “hypermiling: using all sorts of driving techniques and physical modifications to their car to get better gas mileage. You’ll be surprised how high some people can get.
One step that would save 10-20% of our gas would be to bring back the 55 MPH speed limit. Call your legislatures and ask them to write and support such a bill. Climate change is on the way…