What didn’t go right the last few days? What frustrated you? What frustrated her?
While it’s still fresh in your minds, talk about how things went this Christmas. Talk about what you enjoyed, what you would like to do again, and what you hope never happens again. Talk about what was more work than it was worth, and ways to make things more efficient.
Make notes as you talk, and save them where you can find them again (hard copy or computer file, whatever works best for you). Put a reminder on your calendar to check the list mid-November of next year. Then have an even better Christmas next year!