Yesterday we enjoyed a 63 degree, sunshiny day.  Tomorrow, the high  is supposed to be 34 degrees with a wintery mix.  Mother Nature may have multiple personalities, but I love it here, and I wouldn't leave Indiana for all the consistent weather in the world! So how do I keep our home a comfortable temperature without breaking the bank during these crazy Indiana winters?  I've got several tips and tricks to be more energy efficient.  Because going green should save you green! Install a programmable thermostat.    There's just about no way you'll keep up with the changing temperatures on your own, but a programmable thermostat will help keep your home comfortable no matter what is going on outside.  Bonus, you can set it to let the temperature drop when you're asleep or not home to save you even more. Clean or replace your furnace filter regularly.   Different filters have different lifespans so know your filter, but ...