When hosting any Thanksgiving dinner, be it a potluck or one where you do the majority of the cooking, it's a good idea to set the table a couple of days in advance.
Start with a seasonal tablecloth, then add the good china, polished flatware, and wine glasses. Serve the cocktails in tumblers and the turkey on a large platter.
Lots of candlelight creates a festive atmosphere, so place votives on the table and pillar candles around the dining room. Don't forget a bouquet or two of fresh flowers.
Consider the counter space; a lot of it might be in use during the hours before the meal, so a folding table where guests can place their contributions is crucial. If you are attending a potluck, make your dish in a vessel that has a cover or in a disposable pan that can be discarded at the end of the night.