The price offered to lock in heating oil in CT seems to be somewhere around 4.40 a gallon. My last fillup was pushing 1000 dollars (which lasts me one month in the winter). I locked in 2 years ago and the price dropped enough that it was cheaper to use diesel from the gas station (vehicle tax included)! A lock in may save the most money this year and I'm sure I could achieve fractionally lower costs using a co-op or shopping around each month. Really, I can't be bothered. I do know I can't be spending 1500+ for oil. This is a killer in New England where so many homes are heated by oil. If it were just me, I would turn down to just above freezing and sleep under 10 blankets. That is not an option with a wife and 5 young kids. Also, the African clawed frog would be pissed being frozen in a block of ice 4 months a year.
I could do a number of things like investing in better insulation/windows (which I want to do also), but I want a quantum change. A wood stove or a multifuel burner would save me money, but I need to simplify, not introduce more complexity.
I want a geothermal heat pump unit in my house. It leverages the constant underground temperature to both heat and cool. The traditional units needed you to dig up your whole yard to put in the pipes or to dig some very deep wells. I read somewhere that there is a 3000 sq/ft house in a neighboring town that has a combined heat/cooling bill of less than 1000 dollars a year using a traditional deep well geothermal heat pump. I think it cost around 12,000 dollars to install with the clean energy rebates.
A company called GeoEnergy Enterprises has an interesting looking system the call the GeoColumn that uses a water filled shallow well dug with a telephone pole auger to do the same. This allows lower cost and installation in high density residential areas. Apparently you sink one of these under a driveway or even under the foundation. I'm not sure of availability, though they have done some demonstation projects in my general area.