You're too sophisticated to make the rookie mistake of busying the host's hands with a bouquet of flowers or a sad platter of crudités selected en route to the party. Instead, you demonstrate your social graciousness with a luxurious Jo Malone candle. Your grateful hostess can then choose whether to light it during the holiday fête for ambient lighting or save it for her post-party bubble bath. Either way, you've earned yourself VIP status at her next invite-only soiree (if for no other reason than the possibility you'll bring another fabulous gift). Lest you think your work as party guest is complete, don't forget your manners.  Send a prompt and sincere thank you card post-event and by all means, please RSVP next time.