It isn’t always convenient to keep a browser window open that displays your online voicemail manager. Let’s face it, we probably have too many tabs open already.
A word of warning: These greetings will not do you any favors if you're in the midst of a job hunt or work in a conservative industry. Always remember your target personas. If there's a chance they won't appreciate your sense of humor, opt for a straightforward greeting instead.

Rehearse or write down your message before recording it. Remember that old saying “practice makes perfect?” It’s certainly true when it comes to creating an electronic greeting. The more you’ve rehearsed, the easier the message will be to restate. If you don’t have time to practice, writing down the greeting before recording it – and then reading it aloud from the paper – may help you stay focused on the correct wording.
However, for many businesses, there's a need to route calls to the PSTN and other analog phones. This may mean a PSTN gateway, or even a hybrid PBX, where there's at least a small telephone switch located at your office. Your VoIP vendor will let you know if this is necessary at the planning stage. Note that these days, a PBX looks exactly like the other servers in your data center, except with an attached means of handling local and analog phones.