1. Assign seats.
If you know certain relatives don't get along, strategically separate them.
2. Limit libations.
Tempers rise as inhibitions fall: You're more likely to tell your uncle what a jerk he is if you're drinking, and you don't really need to do that. Stick to one cocktail.
3. Open gifts privately.
Don't let the extended family see who got the better presents. Give gifts out individually.
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