[marmis]

When DH got laid off for a few months we tried cutting back. Here are some of the things we did...
In the summer/warm months, keep curtains/blinds closed. Close the doors/vents to any rooms that do not need to be cooled.
Set the AC at one "power saver" temp and leave it. Once it starts warming up in the house the AC will kick in but won't have to work hard to catch up later in the day.
Hang Dry clothes - I always hang towels and jeans. To soften them, I use a little hair conditioner in the washer and then fluff them in the dryer when I bring them in.
Use the clothes dryer only in the evening.
Run dishwasher only when full and then open door to let air dry.
I always have some snacks and juice boxes/bottles of water sitting out for the kids to prevent them from constantly opening the fridge.
We cook on the grill alot in the summer as the oven just heats the house.
Do your big housecleaning early in the morning while it is still cool.

In the winter/colder months...
I have my clothes dryer vented into the house. The dryer will give ALOT of heat while the clothes are drying which makes the furnace run less.
I bake large quantities of food on colder days as the heat from the oven will also help in warming the house.
Plastic on windows - get the shrinky stuff for inside the house
Roll a towel and place in front of the door to prevent and drafts if you have any problems
More clothing - we are always wearing warmer socks - cold feet make you much colder!