not forwarding messages unless strictly necessary, limiting messages’ recipients, and choosing the form of communication that would most efficiently accomplish the task at hand. In a phone call, for example, vocal tone provides real-time feedback on whether a message is being understood—something that’s missing in the low-bandwidth e-mail channel. Facial expressions and body language make in-person meetings an even richer method of communication.
via To Reduce E-mail, Start at the Top – Harvard Business Review. A good article on reducing email – we’ve all done it! So think before you send.