I'd say employ whatever time-saving appliance you can put your hands on. Use your microwave, toaster oven, crock-pot, etc. Check out the area in your grocery store that sells prepared dishes, usually in the deli section. I know our Kroger has some absolutely wonderful fruit salads and other sides that might compliment your meal.
Think about baking a ham and serving baked sweet potatoes (which can easily be done in the oven and kept warm in a crock-pot) and, at serving time, guests can choose a whole potato or cut in half to their preference. Have bowls of soft butter and cinnamon sugar nearby for those who like to "dress up" their sweet potatoes.
My husband loves a dressing recipe that is made in the crock-pot and serves
lots of diners. If you want the recipe, I can post it in a separate thread.
Since it appears you are working up until nearly the last minute, if you plan of serving any kind of sweet after the meal, lean on the expertise of your local bakery or the fresh-baked section of your grocery store. Ditto for rolls to go with dinner.
However, my best suggestion is to ask those attending to contribute, in a small way, to the meal. Perhaps someone could bring a package of rolls. Another, some cranberry dish/relish. Others can chip in with other little necessities for the meal. Don't take on the whole load and make yourself feel guilty/bad if it isn't as smooth and glamorous as you had in mind. Just enjoy the company and conversation.
Worst case...order pizza!
