Make sure your water heater is turned down to 120 degrees F (that is still hot enought to scald). Drain a couple gallons from drain valve on water heater to get sediment out. If you live in hard water area, you may want to do this every few months, otherwise once a year. If your water heater is more than 10 years old, buy a water heater blanket, a 3" thick blanket (tops $30) will pay itself off in one month. Note, this won't make a significant difference on newer water heaters.Take shorter showers, or if that isn't realistic, then turn the water off while soaping up and shampooing. There are showerheads that do this for you. If you have a water waster showerhead, upgrade to a 2.5GPM unit. There are also 1.5GPM showerheads. Less water also means less water heating, so savings on there, too.Caulk around the floor and ceiling of all exterior walls. A lot of temperature escape/infiltration gets through here, and caulking is a very cheap fix!Keep your refrigerator full, it runs more efficiently when full. Keep extra bottles of water for when the groceries run low, just to keep it full. Clean the coils under or behind the refrigerator regularly (monthly or quarterly). If the coils are on the back, then make sure the unit is 2 or 3 inches from the wall to provide proper airflow over the coils.Crawl under your house or up in attic, wherever your heating/cooling ducts are and make sure they are air tight and not heating or cooling the rest of the world (you might be surprised at how much leakage you have). Fix with proper fasteners, glue, and caulking, do not rely on duct tape. Spend some money to wrap the ducting in insulation, *especially* attic ducting.Does you garbage pickup service charge by the size of container you use? Can you get away with a smaller container? Recycling is not only "earth friendly" but can cut your waste volume in half. Collapse and/or shred boxes, flatten milk cartons -- don't pay to throw away the empty space inside those containers!Any car can get significantly better gas mileage by simply driving more casually, no jackrabbit starts or hard braking. These habits also prolong the life of brakes and other components. Make sure you use the *lowest* octane you can, high octane fuel has less energy, thus will lower your MPG (while costing extra at the pump). Change oil with the lowest number oils your car allows (i.e. 5w30 is better than 10w40) will save gas (if you have an older car, you have to balance that with the possibility of burning more oil). Stick to conventional oil, unless you live in extreme cold areas of the country. Keep your tires properly inflated, underinflation robs MPG. Overinflated means extra wear on the tires, while not providing significant MPG improvement. If you have several small trips to take, combine them, and if possible drive the longest leg first to warm up the engine; or arrange them in the shortest overall driving route.Do you have a few friends you see regularly? Start having potluck dinners, sharing both food and company, and use less electricity than watching 2, 3 or 4 TVs after dinner. Play games and use no electricity (or waste your brain) on the TV (or computer).Did you buy any LED Christmas ropes last year? Use them as your outdoor lighting, you will likely find the lighting more pleasant than single glaring lamps, and uses even less electricity than a CFL lightbulb.