A tried and true way to save energy and money is to turn the thermostat down, especially at night. Ours drops to 62, which makes for great sleeping- even for the kids! (Our automatic thermostat has the house warm by the time we get up.) But slipping in and out of bed can be a chilly experience. Invest in flannel sheets to keep cozy. Stay enviro-friendly by choosing products certified by GOTS, which limits chemical use and includes social & environmental responsibility criteria, or OEKO-TEX, which certifies textiles are free from harmful chemicals and has similar social & environmental guarantees.