The most practiced hostess glides from room to room, topping off partially empty champagne glasses and ensuring that nary a canapé tray is ever empty. She mixes and mingles, she charms and chats with everyone on her guest list, and knows that eggnog is for amateurs. Proper hobnobbing would not exist without the effortless hostess, and to her, we are thankful. Show your appreciation this season with gifts that will pamper and delight her.