That depends on the type of spirits they are, if they are friendly and do not generally bother you, then you simply do nothing. However if they are not friendly, you should move. Exorcism or something else won't work.
If the spirits in your home are friendly ones try to make friends and learn how to live with them; if they are unfriendly, maybe you should consider changing your address.
run for your life,shoot your friend,call the cops( make sure to say "there is a ghost in my house and i pooped in my pants and my mom and dad are going to be sooo mad at meeeeeeeeeeee