That's why one gets a larger turkey. The primary leftovers are the meat. The sides add, such as mash potatoes, gravy, sweet potatoes, vegetables, stuffing, cranberry and pumpkin cake for example. The meat, once cooked, can last up to four days after the initial serving if the extras are moved to the fridge quickly after serving and not used. The sides can last longer. The larger turkey, at least 16 lbs or more, is cooked as a meal that will last days versus just Thanksgiving alone. So, ideally, if Thanksgiving is on a Thursday, you should have enough food for lunch and dinner through Sunday night.