Most of the dishes on your menu can probably be made ahead of the big day. Things like casseroles, desserts, and even gravy can be made in advance to save you time on Thanksgiving Day. Prepare the side and bake it or cook it through, then wrap it up and store in the fridge for up to 2 days. Reheat in a 300℉ oven for 5-10 minutes, depending on the dish. Before deciding to prepare a recipe in advance, be sure to read the instructions and any tips that may have been included to make sure you're doing it safely.