Very often you would have experienced a situation where the drop-in visitor is not leaving the place even after the purpose of the visit is over. One of the embarrassing things to do is to ask a person to leave your place. Owing to power and other equations you may find it difficult to ask people to leave your room. At the same time, you may not be able to concentrate on your work.
Whenever you have to meet a person, meet him in his seat rather than in your seat. Whenever somebody says he will come to meet you, offer that you will go to his seat. This will give you an option to meet you, offer that you will go to his seat. This will give you an option to get back to your seat after the meeting is over. When an outsider wants to meet you, consider whether you can have the meetings in a common place such as mini-conference room.
Remember that time management has to be combined with tact and in trying to save your time you should not land up making enemies. Enemies are not born, but made and developed.