What’s the key to a stress-free Thanksgiving? Knowing what to buy! Milk Street Cooking School’s assistant director of education, April Dodd, shares 5 Turkey Day shopping tips that will take the guesswork out of your meal prep, in partnership with Whole Foods Market. * The best part of Thanksgiving isn’t the dinner, it’s the leftovers. When shopping for your bird, aim for 2 pounds of turkey per person. * The difference between air-chilled and water-chilled is simple: Was air or water used to cool