When the opportunity for celebrating knocks, answer the door and offer it some Champagne says Karen Bussen. Author of the bestselling Simple Stunning wedding series, Bussen now directs her experts eye to a more intimate kind of festivity: the at-home party. Her simple stunning credo, though, remains the same: Create menus featuring wonderful ingredients in no-fuss, crowd-pleasing preparations; combine homemade and store-bought items in fresh, elegant presentations; tailor colors, tableware, and lighting for visual impact; and limit effort, expense, and waste.