Yesterday was Dr. Green, today we have Mr. Windows.

It's the third installment of our Housewarmers' Toolkit series, which helps you save energy and dollars by making little modifications to your home.

Time, after all, is running out: There are just 23 shopping days left - not till Christmas, but till the end of the calendar year. With that in mind we have some deals on windows and doors that qualify for 2009 tax savings, as well as other important 'fenestration' info.

Next week we'll crawl around in your creepy-crawly spaces looking for ways to save heat and money. And we'll have details on the president's just-announced "Cash for Caulkers" program.