A real pumpkin makes a great center piece and you can always use it for a delicious soup when the party is over. Add some fake little pumpkins and leaves to give it color. Those can be reused year after year .
Use lots of candles of different sizes. It is a sure way to impart some magic to your table. Do not forget that this is the time to use your best linen and your china.
Wear something nice and festive. Honor the Holiday. We should all be on our best behavior and ready to count our blessings.