These produce less heat and save energy and can be used in any room in the house. If you are not in a room, make sure all the lights are off. Also, use lighting appropriate for the task. A small reading lamp in your favorite chair is more efficient than lighting the whole room. Take a shower instead of a bath.
Showers use less water than baths.
If you are using more water, then chances are you're using more hot water and paying for the water and the energy used to heat it. Don't use the dishwasher's drying setting. Instead let dishes air dry. If your dishwasher doesn't include a control for drying, simply turn off the dishwasher after the final rinse, and open the door to dry the dishes more quickly. Do not overload your dishwasher, clothes washer or clothes dryer.