Don’t overinsulate. Depending on where you live, you may not need insulation with the highest R-value (a measure of its ability to resist heat flow). For example, outfitting an 800-square-foot attic in Florida with high-quality R-60 fiberglass loose fill would cost about $2,480, whereas using R-30, which is sufficient in warmer climates, would run only about $1,120. To find out how much insulation you need, go to energystar.gov.
Change your filter only when it’s dirty. Install a whistle on your furnace ($1.70, amconservationgroup.com) that alerts you when your filter is partially clogged and will soon need to be replaced, says Ed Pollock, a spokesperson for the U.S. Department of Energy.
Opt for a weatherproofing kit. If you buy plastic shrink wrap, weather stripping, and electrical-outlet sealers individually, you’ll pay about 30 percent more than if you buy them in a set ($58, amconservationgroup.com). Use all the components and you’ll reduce your energy costs by up to 20 percent. - See more at: http://blog.avadiancu.com/2012/12/how-to-save-on-winterizing-your-home.html#sthash.GYIHtwF3.dpuf