For those who like tongue and cheek, see Todd Levin's guide to choosing wine.
When the waiter arrives with your wine, you'll obviously need to remind him that his station is beneath you by barking demands while he pours, like, "Keep it coming, Robespierre," or, "Don't forget that I can buy and sell you, you miserable cur." Then, when your server has completed the pour, it is customary to raise your hand as if to strike his face.
via Phil