To get rid of ghosts, put your shoes in different directions, leave clothes on the floor, basically mess up your room.
Ghosts are compulsively neat, so a messy room can annoy them enough to leave.
For Amish ghosts, listen to dubstep or something to scare it off.
In the case that the dubstep angers the ghost, get your vacuum ready. You're gonna need it.
EDIT: if you find yourself in a haunted house, make sure to NEVER EVER go in a room with baby dolls.
The last thing you want is you bleeding in a room full on possessed ghost-y baby dolls.
Get yourself the forget outta there.