If you live in Ottawa or Toronto (other areas are covered as well) then I suggest you check out the peaksaver program. The idea is to help the utilities control the load on the electricity system during peak periods. By signing up for the program you allow your utility to bump your thermostat setting a few degrees when necessary (think 30+ days in the summer).
For giving up a little control they pass along some nice incentives. You get a one time rebate for signing up. They also come to your home to install a new programmable thermostat which has a pretty cool feature, allowing control from a website. This feature is great if you set the thermostat to hold while you are away on vacation, just login a few hours before you get home and you return to a nice comfortable house. Not bad for something that costs you nothing but a degree or two!