Luckily, I've gotten past some of the typical fights, snits, and drama that can occur during the Holidays. But if you haven't had that fortune yet. You might want to check out a great article on Shine.
Essentially, it's how to avoid the holiday family fights. Specifically, how to handle the following types of people:
The "Constructive" Criticizer
The Emotional Wreck
The Drunk Uncle
This is obviously hilarious. But it does have some helpful tips. And please, people, avoid being any one of these. ;)