It may seem like one small step for planet Earth...and it is. But we all need to do our part, and reducing your home's need for heat is a good way to start. In our house the wind tends to whistle in underneath doors that hover a little too high over their sills. So we were delighted to accident across not martha's flickr tutorial on stopping the draft using "those long gray tubes you see kids swordfighting with in hardware stores" (copper pipe insulation foam) and a sewing machine. Her instructions and tips are very thorough, and beautifully-documented too. Check it out here.