Which Table Manners Do You Think are "The Essentials"?

We don't do a lot of formal dining the rest of the year, and then suddenly the holiday season is upon us and we have to remember if elbows on the table is a "do" or a "don't" at Grandma's house. We're curious what you consider to be the most essential elements of table manners and etiquette -- during the holidays and the rest of the year, too!

Weigh In: What Are the Essentials of Good Table Manners?