Reduce electricity demand (KW) by staggering equipment and appliance start-up and usage. When high energy-using equipment all runs at one time, the load on an HVAC system spikes, peaking demand. By running appliances at different times, the demand on the system will remain constant, rather than spike up and down.
Try planting a vegetable or herb garden in your backyard. Growing your own food can save money on groceries, as well as reduce the amount of energy and fuel used to transport that food from the farm to the grocery store, and from the grocery store to your house.
Try to take a shorter shower. Old shower heads can use up to 5 gallons of water per minute (US Geological Survey). Shortening your showers (and using water-saving showerheads) can reduce water consumption significantly!