It's freakin' cold out there! Which is why this Blue Marble article on the energy and cost efficiencies of space headers is particularly timely. I noticed these wise words in particular: "It's also worth noting that if your house isn't well insulated, you're definitely losing money and wasting energy, no matter what kind of heat you use." That's why I'd suggest Sierra Club's Green Life blog for its fantastic tips on insulation and winterizing your home here, here, here, and here. Consider these articles investment advice. You save money in the long run.

-- Brian Foley