I'm also trying to combine errands. One of my big car efficiency tips is to keep your car in top shape. Make sure it has a recent tune up (with a new air filter), check that the tires are properly inflated and take any extra weight out of the car. Next time you need to get tires, look for tires that are rated for higher inflation pressure. Most tires today are rated for 35 pounds per square inch (PSI) of pressure but some newer tires have ratings of 44 and 51 psi. The higher your tires are inflated, the better your gas mileage will be. However, keep it at least a couple psi below the rated amount.

I already walk a lot of places and also use the stairs instead of the elevator whenever possible. Not only does it save energy, it's good for your health.

--Bob