SIMPLE: Personalized paper wine tags fit snugly around the stems of wineglasses to prevent you from sipping someone else's Shiraz during cocktail hour ($5 for 20 Wineware tags, www.winetag.com).

FANCY: Give each guest a different "wine charm" to dangle from her glass. Available in gift shops and wine stores, they come in a range of styles, from colored crystal charms to pewter figures of vintage scooters and golf gear. WineThingies charms range from $6 to $30 for a set of six (www.winethingies.com).