9/11
You See Strange Shadows
Though this could be attributed to lighting, if you see human-like shadows without a human attached to them, you may have a ghost.
10/11
Your House has a Spooky History
Was someone murdered in your house? Was your house built on top of a cemetery or a property where something evil happened? You might find some of this in a home disclosure, so be sure to ask your real estate agent before you buy a house. This could be why your house is haunted.
11/11
You Get a Vibe
You know yourself and your surroundings, so if you feel like there may be ghosts lurking, there just might be, especially if you feel like someone is watching you. Again, if this is a concern for you, consult a professional. Remember, your house may have unique energy, and not necessarily be haunted.