There's also the tried and true method of just imagining everyone in their underwear. If that doesn't work then just remember everyone there just wants to have fun. If you get someone who is so much trouble you cannot work with him or her, or if that person disrupts the fun of the table to the point of ruining their experience, you can always ask that person to leave. In the end, you are the boss of fun for the table. And part of players having fun on the table is when they see you, the GM, having fun as well.
