Saw this online and it was a good reminder! It would work for any special occaision!!!
1) it's ONE DAY out of the year. So have anything (within reason), and don't stress. Enjoy it.
2) Savor foods that are particular to that holiday, and skip anything that you don't really care as well as things that are always available throughout the year - ie. the bread basket, cheese tray, etc.
3) Remember: one day means back to good habits the next day - no excuses.
4) Go for a long walk after the meal!