Keep it simple, concise and to the point. Callers won’t need your life story, and won’t want to wait around for a 2-minute greeting to end just so they can leave a message. Don’t hide the details, tell them where you will be, when you will be there, or when you won’t be there, and how to get in touch.
Creating funny voicemail messages that are fun for your callers to listen to can be quite entertaining for you too. Instead of leaving a standard, boring voicemail greeting in place, you can use a little creativity that makes callers chuckle or laugh out loud. An easy way to come up with ideas is to do a play on popular TV shows, parody a government agency, or give voice to a machine that has come to life and is expressing its unique personality. A private voicemail box enables a person to receive telephone messages when the phone cannot be answered.

It can help to rough out a script to start each message that includes your name and the name of the practice, so that it’s clear right away who called. If you need a reply urgently, say that right away, too, since the person may not listen to the whole message.
The next step is very important and you need to get it right. Say your phone number two times very slowly so the person has enough time to write down your number as they are listening to your message the first time.