when you have lunch at work, bring it from home or go to a local grocery store and pick up enough for 3-4 days. (I was spending $8/day on eating out for lunch, now that I'm bringing it, it's roughly $3/day - over $750/year savings!)
keep your gas tank full, and tires properly inflated. drive with cruise control when you can, and at a slower speed (55 or 60 on the highway)
conserve water - wash full loads of clothes and dishes (newer dishwashers are far more environmentally friendly than washing by hand) turn off the water while brushing your teeth, shaving, etc. Put a brick in your toilet. Fix leaks. (I don't know about your water bill, but average ones in Atlanta are around $80 at some of the properties we service!)
blankets help cut down on how much heat is needed
cook at home
do you really need a landline/telephone line? we cut ours down to just the very basic local service - bill went from $105 per month to $19 per month
cable/satellite - again, cut out the extra "fluff" - We cut out HBO and save $35 per month!
when you go to run errands, run them all in one swoop so to avoid little trips here and there
buy store brands and use coupons!
drink water from the tap - it's cheaper and healthier than bottled water
hope these help