Those are urban myths that kids tell each other for fun. Their attraction lies in creating a sense of underlying danger in everyday situations like a bathroom mirror, and a sense of thrill in daring each other to try to test the myth.
If you want to be more afraid alone at home, some understated horror movies like The Ring are a good choice.
If you are wanting to experience fear and thrill of of overcoming it, some things to try:
Go hiking alone in the dark, preferably in an area with no actually dangerous predators.