This is a small paperback that discusses mostly British ghosts, but Mr. Wilson is one of the best in the field in terms of being sufficiently skeptical, and using scientific methods to try to make sense of hauntings. I refer to his concepts often. Basic rules of ghosthunting. You'd be amazed at how many people think it's okay to break the law and invade other's property, in pursuit of ghosts. Pre-screen the site.
Some people are too eager for a paranormal experience.
Others remain calm until their first encounter with something startling, aggressive, or unusual. Nervous people either jump at shadows, or turn sarcastically skeptical. Few people, in their early ghost hunts, are able to keep a cool and objective viewpoint in a truly haunted setting. Do the best that you can. If you're losing it, leave.