Our March One Small Change was so simple... we turned down the thermostat every night to 60-62 F. Simple enough, and SO effective! Especially if you have a programmable one (which we don't).
Looking at our February (that is when we started this change) and March energy bills, we have cut our usage almost in half compared to last year!! Granted, it probably wasn't as cold this year as it was last... still - what a result! Who knew something so easy could make such an impact!
Stay tuned for our April change ... I will post about it later today!