Be sure to keep your eating to mealtimes. Rather than nibbling at treats all day, take a space of 4-6 hours before eating again. Have what you want all at once, the earlier in the day, the better. Trust me, you will feel the difference in your over-all digestion if you take nice breaks throughout the festivities.
Sip warm water throughout the day to aid digestion.
For acid stomach, drink licorice or mint tea. For bloating and gas, drink ginger tea. You can have a strong cup of ginger tea 30 minutes before meals to fire up the Agni (digestive fire).
Take walks after meals. Snow or shine!