What to wear: Winter clothes! Red sweater and scarf, tan jacket, Christmas beanie, and for effect, hold a toothbrush and some aftershave.
How to act: Recite lines from that old film Kevin watches in Home Alone. (Trivia: it's not actually a real film, but you can find the quotes of the footage, which was created for Home Alone.) Now get outta here, ya filthy animal.