Giving Up The Ghost
Follow these ghostbusting tips, and that pesky spirit in your Brooklyn brownstone will have to find another borough to say "Boo" in.
Burn Sage
According to wikiHow, the Native Americans knew that burning sage grasses can help cleanse a space of negative energies. Burn sage in the rooms where you have had ghostly happenings and ask the spirits to leave.
Call a Priest
Praying for the ghosts to leave may help counter a malevolent spiritual force with a positive one. If you want to go all out, you can invite a priest, shaman or other religious leader into your home to battle the ghosts, or place sacred objects around the rooms.
Call a Ghost Expert
Most of the reputable paranormal investigation services are free because they want to use your ghost to help prove the existence of a spirit world. You may be invited to play a role in dispelling the ghost from your own home. Ghost hunting services that charge a lot of money could potentially be scams, so you should check their references carefully before signing on.
Clean
Cleaning the place up can't hurt. Wash your carpets, your curtains and your clothes. Even if your supernatural intruders remain, some unpleasant odors may vanish.
Ask Them to Leave
Telling your ghost to "seek the light" and leave this plane of existence may work. The ghost may just be hanging around because it's afraid of whatever lies ahead, and some firm encouragement may be the push it needs.
Compromise
When it comes to laying claim on their territory, ghosts are the original grandfathered tenants. Your ghost may have been in your apartment decades before you, and asking it to leave entirely might be a little unfair. Instead, talk to it in a reasonable tone of voice and ask it to stop doing the things that irritate you, such as pulling the silverware out of your drawers or flicking your bedroom light on and off in the middle of the night. It is possible that, like Bruce Willis in "The Sixth Sense," your ghost doesn't even realize it's dead, and thinks it's just going about its normal business. Explaining to it that it will have to behave, if it wants to spend its afterlife in your apartment, may put an end to the troubles you've been having.
Ghost tips are courtesy of these sites: How to Get Rid of Things, Angels & Ghosts and wikiHow.