Money out the window?

“During the winter months, replace your screens with storm windows to provide an extra barrier to the cold outside air. Caulk and weather-strip around windows and doors that leak air. If replacing windows, choose ENERGY STAR Certified models designed for your area, and save $150-500 per year in energy costs. With proper installation to ensure all gaps around them are sealed, ENERGY STAR Certified windows can help improve your comfort, cut drafts, and reduce fading of interior furnishings.”