Cleaning is a big thing. Regularly remove the dust from heaters, air conditioners, exhaust fans, ceiling fans etc. this will improve the efficiency with which the motor/appliance will operate. In short, it will use less electricity to produce its optimum result of heating, sucking, blowing etc. Then there’s the more common information which you’ve probably heard before like, turn appliances OFF at the wall socket, set up lights onto timers or sensors so they are not always left ON, put the energy saving globes in lights where you can, close doors and windows when you are trying to heat and open them when you are trying to cool. Again, there are many options.