I'm a Beginner

I've been finally starting to become more eco-friendly. I have to drive to work, but I have a fairly fuel-efficient car that I bought recently. I managed to get not only myself, but my roommates, to start recycling, and I've been better about turning the computer onto hibernate when I'm not using it. I turn lights off in rooms I'm not using, fill the washer and dryer as full as possible before doing laundry, and fill the dishwasher as full as I can before doing a load of dishes. I'm open to any other suggestions that a semi-urban environmentalist can do!