[*]# Reduce your commute. Move closer to work, work closer to home, or take public transportation to your job. While you're considering spending all that money on a new hybrid or diesel vehicle to 'save money', you could move closer to your job, or get a job closer to your home. Then you will be able to walk or ride a bike on nice days, and spend a lot less time in the car when the weather isn't so nice. You may even be able to get rid of one family car. If you walk or ride almost all the time, it doesn't matter what sort of mileage your current car gets while it collects dust in the driveway.
i'm actually doing this. i liv like 15 mins from work and i take the bus to work now..its kinda fun considering ur alone in ur car and the chicks you get to meet in the bus my car is been only used either in the night or during weekends and holidays