In my line of work, I often deal with people who have (or claim to have) ghosts in their houses. Inevitably, most of them ask me what they should do about it.
First let me say that over the years I have been involved in ghost research, the vast majority of the cases I've investigated have had perfectly natural explanations. That is not to say that some haven't puzzled me, or left me feeling the house in question was indeed haunted. Even if you're house is not haunted, it's easy to get caught up in the idea that it is, thinking every bump and creak you hear is something ghostly.
As witness to a series of what could be considered ghostly events, you must first determine whether or not those events are natural or supernatural. In order to do this, relax and be a good observer. Even if you're scared by what you've seen or heard, it's important that you first give the occurrences some rational thought. Are those "phantom footsteps" you heard simply the house settling, or the floorboards creaking? Was that "cold chill" merely a draft? Was that "ghost" you saw out of the corner of your eye nothing more than a trick of the light? Here are some common natural causes to look for, and how to move forward if you've eliminated them all.