There are two kinds of people in this world: those who plan their costumes for weeks and those who panic and wear a lampshade at the last minute. But have no fear: Our last-minute, budget-conscious costume guide is here. What: Barack-o-Lantern How to: Dress in head-to-toe orange, write “change” or “hope” in black letters across your chest, and look really, really earnest while raising a lighter in the air. What: Boo-Tooth How to: Wear a bed sheet, strap on your wireless communications device, and make no apologies for using it throughout the night. What: Gossip Ghoul How to: Wear the most heinous mask you can find and a tartan mini. Say OMG and dramatically text message about other partygoers all night. What: Henna Montana How to: Tattoo your palms and dress in western wear. It might help to sing a bit. What: Palin Comparison How to: Grab a friend, fashion similar updos, wink a lot, and ask people to size you up. What: Pirated DVD How to: Wear your best eye patch and glue on some favorite discs. Tell the requisite jokes about being rated aaarrrgh. What: Walk of Shame How to: Wear an oversize button-down, boxers, and heels. Tease your hair, mess up your makeup, and walk furtively through the party. There now. You’re ready to hit your favorite haunts.