Hold large stemmed glasses by the base of the bowl.
White chilled wine and small stemmed glasses should be held by the stem.
Goblets should be held at the base of the glass.
Brandy snifters should be held by the under side of the bowl with the hand turned upward.
Make sure to swallow first. You don't want any food in your mouth when you take a drink.
You should wipe your lips with a napkin first, this keeps the glass free of grease and food marks.