change all your light bulbs in the house to cfl's. put your water heater on a switch, so you can shut it off when your at work or the house is empty. put 3 min timer switches on lights that always get left on, such as in hallways... buy a good, digital thermostat with a 7day schedule, take the time and program it to run in economy mode when the house is empty. get better attic insulation, run your op on a reverse lighting schedule (lights on at night, off during daytime) this will reduce a/c costs in the summer, and reduce heating in the winter, and also get your op off of peak power times where the power company can bill you a higher rate in some area. (pro rated billing can only happen if your electrical meter is a smart meter) if your going hydro, use a gravity powered drip system controlled by a solenoid vavle, that way you can lose costly pumps runnin a few mins each hour... theres tons of things you can do...