The world needs a new source of energy, an unspillable source.

Which household appliances and electronics use the most electricity?

I live in the New Haven area of Connecticut and our electric bills have absolutely skyrocketed in the past year. What are some good ways to conserve electricity on a daily basis? Which household electronics and appliances use the most electricity?
Which will cost more on the electric bill-
Using space heaters or leaving the heat on?