Getting Rid of People in the New Year

Some people come into our lives for a reason (e.g., to help us, to grow us, to teach us, etc.). Others come in for a season (i.e., a short period of time to do what needs to be done). Give us your thoughts on "getting rid of people in the new year." What reasons do you have for wanting to get rid of people in our life? What kind of people are they?