
Make sure, that if you're a heavy commuter to work, that you travel in times of decreased traffic. Sitting in traffic not moving anywhere and just letting your car idle will eat up your fuel and eat up your money.
Keep your oil and oil filter changed at the proper intervals. It's not only a good idea to get your oil changed, but it needs to have the proper oil there to be effective. In addition, if you travel long distances, use your cruise control if you can.
Being mindful of these few things can help save you big bucks!