Want to keep things light and simple while making your callers laugh when they hear your greeting? Serious, monotonous greetings can leave the caller depressed (perhaps, not literally). What I mean to say is, keep the greeting livelier.
In certain situations, it’s a good idea to let a call go to voicemail. If you’re in a loud area, unable to spend 10-15 minutes talking, or are otherwise distracted, don’t answer. Recruiters who cold-call candidates will understand that you’re simply unavailable – but make sure to return calls in a timely manner. If possible, call back during regular business hours.

Business professionals are also encouraged to keep their voicemail organized. Delete any messages from the office phone that are no longer necessary after calls are returned, and write down any phone numbers that are needed at the time the message is listened to. If modern voicemail service is utilized, such as that supplied by Voicemail Office, in which voicemail and fax messages are received in a staff member’s email inbox, the individual should write a short explanation in the body of the email if forwarding any voicemail messages to other staff members.
You might call this one a sign of Potomac Fever. To the tune of "Hail to the Chief": "We are not in the Oval Office at this time. We will, to the best of our abilities, faithfully execute the task of calling you back, so help us God."