Not judging your tactics, but do you have an idea of what your savings on your heating bill actually are as compared to say 70 or 71 degrees? Personally, my daily comfort is more important to me than the dollars in my entertainment budgetYep, I've raised the blinds on all of our south facing windows to let as much sunlight into our house as possible, and I lowered our thermostat to 68 degrees. Every little bit helps.