Work up your Mis en Place: This is a French term for preparing all the ingredients for a dish in advance, such as washing, trimming and chopping vegetables; setting out your spices and herbs, etc. Clean and dry salad greens, and store in a resealable plastic bag. Notice in these photos that I found, they used tin foil baking pans to hold the ingredients for each menu item. They used throwaway cups and tops. I think this is one of the handiest tips I've found in a while!
Make Cranberry Sauce or Cranberry Relish or Cranberry Salad and store in container in refrigerator so it can marinate.
Make breads and rolls -- freeze.
Work on your Thanksgiving decorations. A table decoration, placecards, silk flower arrangements, candles, etc. I found these online. Aren't these table arrangements lovely!!!