Sure, just go around ghost-hunting and become a paranormal "expert". No one wants to deal with groupies, so why would ghosts be different? Besides, half of the fun is spooking unsuspecting victims. These folks have imagined every hypothetical scenario and devised scripts, spells, artifacts, weapons, and all sorts of random nonsense to deal with ghosts. Granted, I doubt they could even retain their sanity if they actually found a ghost, let alone execute their plans. This would be an amusing sight, wouldn't it? But it won't be so amusing when they decide to haunt you asking for photographs, autographs, marriage proposals or whatever. Damn groupies. Anyway, ghosts aren't even that bad, really. They're just a bit too excited about photobombing.
In fact I don't believe in the existence of ghosts. The more you imagine ghosts exist, the more they'll haunt you. The best thing to do is forget that they exist although there are those people who claim to be haunted by them. For those kind of people, I believe that the best way out is to deal with prayers. Prayers have helped lots of people having the same problem and you can be given some ointment to apply every day for a certain period of time.
Actually there are no more solutions apart from those mentioned above and you really have to erase those thoughts of ghosts from your mind. I know of someone who claims to have ghosts haunting her and it's really affected her in some way. If anything negative happens to her, she claims its the devils in her.