Back at holiday time, stringing up lights in my son's school lobby, I found myself entangled, literally, with a mom I'd never met before, Dr. Katie Kelter. Turns out, we had lots to talk about: A pediatrician and lactation consultant, she's one of the founders of the just-launched New York Milk Bank, a nonprofit that collects and pasteurizes donor breastmilk for premature or critically ill babies. I got all kinds of great advice from her for my book, T5T and when I followed up with her recently, she told me how easy it is to donate—money, obviously (the program helps underserved communities), but also surplus milk. "If any of your readers are lucky enough to have a freezer bursting at the seams with extra milk, they can go to the Human Milk Banking Association of North America (HMBANA.org) to find out if they're eligible to become a donor," says Dr. Kelter. All it takes is a medical screening and a blood test. Then you drop the milk off at a local depot or mail it (for free) via Fed-Ex. "Your milk is pasteurized and given to premature infants whose own mothers' milk is unavailable," says Dr. K. "You can actually save lives."