There are many ways to communicate with someone. Research is clear, however, that some ways clearly are not as effective as others.

There are many ways to communicate with someone. Research is clear, however, that some ways clearly are not as effective as others.  So when should you rely on face to face communication, and when is an email more effective? Will a phone call do, or should you arrange a personal meeting? Do you have an experiences when one form was more important than the other?