Shorten Your Oven's Auto-Cooldown Cycle

From Wiki

If your oven is like a lot others, it uses a fan to keep its enclosure cool (so it doesn't get so hot that it burns your kitchen down). This fan is driven by a thermostat and it will keep whirring away until the oven's enclosure has reached a safe temperature. Many modern ovens that cool themselves off in this fashion will continue their auto-cooling cycling even though the oven itself has been turned off. Depending on what season it is during the year and how hot or cold your kitchen is, one way to shorten this auto-cooldown cycle (thereby using less power to drive the fan and extending your fan's life) is to leave the oven open after you've shut it off. Even if you open your oven part way, so people don't touch the hot surfaces (and your kids don't bump their heads on the door), you'll shorten the auto-cooldown cycle by a bit.

This tip may not apply to all households. If your oven is near the floor and you have children or pets, you obviously wouldn't want to do this. In the winter, just the bit of heat that this technique contributes to the heating of your kitchen could also offset an minute amount of the energy that's normally required to heat your engine.

Further, you should check the wattage rating of the internal light bulb within the oven (s for double) as these are often in the 75 to 150 watt range. Opening the door often forces the light on (with no independent off switch) thereby adding additional heating into what should be a cooling oven. The net effect will be a longer cool-down cycle and additional energy consumption. Though incandescent light bulbs make great heaters this may not be an ideal use of energy.