First of all, check and see if the utility bill is estimated. Sometimes they take an average consumption. Secondly, since you do alot of laundry, remember that the dryer uses 220v. It draws lots of power. In the summer, you would save money drying your clothes outside. A front loading washing machine uses way less electricity than a top load washer. It also uses less soap, and less water. It spins at a higher rpm therefore, you have to use the dryer for a shorter time. If your dryer has a sensor option, use it. It will automatically shut off when the clothes are dry instead of being on a timer and running unnecessarily.
When you are boiling water for tea, never use your stove element.. Again you are using 220v. Instead use a kettle that plugs in to the wall.
Replace all of your light bulbs with energy efficient ones.. they last forever, and use less energy. Replace your Christmas lights with led lights.. along with saving money on energy, you won't have to worry about them starting a house fire.
If you have gaps in between the frame of the doors or windows, stuff them with pink insulation to prevent your heat from escaping. When my husband and I lived in an older home, we lined the outside of the windows in the winter with plastic.. it helped retain the heat. When you use the oven, make sure you cook a couple of meals ahead of time for use during the week.. I always plan ahead when I turn the oven on since it's an energy hog.
Hope that helps a bit.