Toasts to the newly betrothed are meant to be short and sweet. Memorize a favorite quote and have it ready. Wait until the host gives a welcome toast, then offer yours. One woman swears by this fail-safe standby: "Antoine de Saint-Exupery said, 'Love does not consist in gazing at each other, but in looking together in the same direction.' To Tom and Mary. You can't take your eyes off each other tonight, but we all know you're just as focused on the road ahead!" Speak clearly and deliberately, look the couple straight in the eyes, and, above all, smile. Remember to keep the tone light and upbeat. Anything more weighty than general good wishes and humorous advice should be saved for the rehearsal dinner or the wedding reception.