While mistletoe seems to be an open invitation, all gentlemen must remember not to get too carried away. Be careful not to turn into one of those party clichés. Keep your cool, and be gracious to the lady. A kiss on the cheek is always a good place to start, and if her eyes spark and twinkle, well then go for a little lip. Soft, brief and gentle wins all the time (best to leave the tongue behind), and could lead to something special!