There is no need to rinse dishes before putting them into dishwasher. You can scrap off leftover food with paper towel. Always wash full loads and use a right program, e.g. a short program is enough for coffee cups.
Don’t leave oven and hotplates on too hot temperature.
Don’t keep range hood on for no reason, warm air will go out through it.
Use the pre- and post-heat of the oven. Many dishes can be put in cold oven and remember that you can leave food to make up in post-heat as well.
Electronic devices like water kettle, coffee maker, microwave and toaster are ecological and usually a faster option for oven.