While you might be thinking of putting off that kitchen upgrade or bathroom remodel in light of the challenging economy, there are some home improvements you may not want to postpone.

While many are undoubtedly making New Year’s resolutions to diet and lose weight in 2010, it’s also a good time to think about putting their homes on a diet – an energy diet – in the coming year.

According to Bill Cunningham, a home comfort specialist with Lennox – a leading manufacturer of heating, cooling and indoor air quality equipment – there are three common mistakes people tend to make when the air stops circulating at home.