Reduce demand by turning thermostats down in the winter and up in the summer.
Make sure that you don't have any "phantom loads". Many electronic devices like televisions, DVD players and stero systems are actually consuming power even when they are "turned off". They are like a leaky water faucet constantly consuming electricity. You can prevent this by putting these devices on a power bar and turning the switch on the power bar off when these devices are not in use.
Purchase 100% green electricity. This allows you to set your consumption of electricity to 100% green producing zero carbon and other emissions.
Gas
Passive Solar House
Reduce your consumption by turning thermostats down in the winter and up in the summer.
Replace your gas appliances with the most efficient ones available.
Supplement your gas water heating with solar thermal pre-heating.
Consider installing an in-line water heating system so that your hot water tank doesn't constantly need to be heated.
Offset your carbon emissions by selecting a reputable provider with transparent auditing authorized by internationally recognized entities. You can then apply a 50-25% green percentage for these offsets to reflect the reduction in your footprint.
Oil
Reduce your consumption by turning thermostats down in the winter and up in the summer.
Replace your oil furnace with the most efficient ones available or switch to gas if you can.
Offset your carbon emissions by selecting a reputable provider with transparent auditing authorized by internationally recognized entities. You can then apply a 50-25% green percentage for these offsets to reflect the reduction in your footprint.