Contact your local utility company to see if purchasing energy from renewable sources is an option for you. Buying green energy directly from a power company is one of the easiest ways to go green with your energy use, without having to invest in any major alterations to your home.
If you have a car with a diesel engine, think about switching to biodiesel. Biodiesel is degradable is will not have any harmful effects on the environment. However, using biodiesel can be expensive and finding filling stations is hard. If you can afford to use this alternative, do your best to reduce harmful emanations from diesel engines.
If your home has a pool or hot tub, look into a solar water heating system. Installing a solar water heating system costs about the same as a conventional system, but operating costs for the system will be much lower. Repair costs for solar heating systems are often lower as well.
SCORE Student and Community Outreach on Renter Energy gives free energy visits to University of Colorado Students who live in certain Boulder Colorado …
Save energy, and your hard-earned dollars, by only using your washing machine and dishwasher when you have a full load. A small load uses just as much energy as a full load and accomplishes a lot less for the energy expenditure. Let laundry stack up another day or two in order to maximize savings and efficiency. Also consider drying clothes outdoors on a clothesline if allowed in your area. The fresh outdoorsy scent can't be beat, and you will show a significant savings in your utility bill if you cut back on your dryer usage.
Do not leave your freezer and refrigerator open for a long period of time. Of course this can spoil your food, but it can also use large amounts of energy. When you are cooking but you need food from the refrigerator or freezer, keep it closed after you get something out of it.