These days vampires come in all shapes and sizes, and they are such iconic pop culture figures that there are plenty of TV and movie vampire characters for you to mimic.
What you need to do: Get a pair of fake vampire fangs, and wear foundation that is shades lighter than normal. Be creative and aim to look like vampires from popular TV shows and movies like True Blood. Dribble some fake blood or red food coloring on the side of your mouth. If you're a vampire that has been turned recently, use dark eyeliner to draw in two holes on your neck.