Learn how to vanish like a ninja in the night, leaving only a trail of mystery and intrigue.
Convince anyone you're a functional member of the party, even when you're not.
Make a hasty exit without drawing too much attention, or at least without spilling the punch.
Re-emerge from the shadows, refreshed and revitalized, like a phoenix from the ashes of poor life choices.
More Advanced Techniques Party Hacks for the Modern Crashers Party Etiquette for the Inept