Earlier this year we used 4,205 kilowatt-hours in one month.
That's 4.2 megawatt/hours. Or roughly the entire output of a very small power plant for 1 hour.
At around 6 cents a kilowatt-hour, that's cheap but at the same time a problem.
Galen and I just enabled hibernation on our three home pc's after 1 hour. We've replaced some of the incandescent bulbs with fluorescents. Next I need to look at the A/C system. It's a heat pump design, which I'm rather unfamiliar with. If it uses R22, I have the equipment to tune it. If not, well ... I can try the basic stuff like cleaning the condenser outside, upgrading the blower motor in the furnace, etc.
$250/mo is a bit too much for electricity.
Of course, that would be $1219 in the bay area, california. @ 29 cents per kilowatt hour on the highest 300%+ tier. Which, I truely hope doesn't exist anymore. :P