Augustine Dauterman
Augustine Dauterman voted up Araya Lioness' answer

Find a negative aspect about the guy that irritates you and blow it out of proportion so that it consumes his attraction.

Always works for me. For instance, if a guy's good looking, I'm hot for him usually. But as soon as he opens his mouth and is disrespectful/rude/disgusting/repulsive/scummy, he's not interesting at all anymore.

Augustine Dauterman
Augustine Dauterman voted up Araya Lioness' answer

Find a negative aspect about the guy that irritates you and blow it out of proportion so that it consumes his attraction.

Always works for me. For instance, if a guy's good looking, I'm hot for him usually. But as soon as he opens his mouth and is disrespectful/rude/disgusting/repulsive/scummy, he's not interesting at all anymore.