Agree to meet at a mutually convenient time to discuss things. It is not always possible to avoid an unexpected interruption. Just be sure to try and keep the conversation brief and to the point. Even if you waste only five minutes a visit and have only five visitors a day, you ll still lose more than two hours per week. This will signal to the visitor that you have things to do and it is time for them to go.
Telephone calls are another major time waster.
The simplest solution is to not answer it. Let the answering machine screen calls when you are busy and do not want to be disturbed. Then plan a time to return the calls. Grouping similar activities is always a big time saver. Before returning a call, make an outline of what you want to discuss.