I wish I had seen this post prior to the holiday. I know it is a little late for Thanksgiving but maybe some of my ideas will help for Christmas.
I made Martha Stewart's totally homemade greenbean casserole this year and fried the shallots the day before and sauteed the veggies the day before. It made assembly very easy. I also made the sweet potato casserole and warmed fruit compote the day before. When ready to cook the next day I just sat them on the counter for 30 minutes and then put them in the oven according to the recipe. I also have a recipe for refrigerator yeast rolls which is super easy. I make the dough the day before and place it in the frig. The next day, when ready to bake, I put them in the pan about 2 hours before baking, let them rise, and then bake as usual. The great part about these rolls is that you don't have to bake them all at once so we have freshly baked rolls with all of our leftovers for the next few days. I also baked my breadcrumbs for the stuffing the day before.
Hope this helps. Would love to hear everyone else's tips and ideas.