No one wants to sit and listen to someone talking drone and monotone on a voicemail greeting. Remember to keep it upbeat and avoid sounding like a robot!
Solution: Make it easier for callers to reach a real person. For example, if you have multiple phone lines, Spectrum Business Voice offers you the option of setting up an auto-attendant that answers your business phone and provides callers with a menu of options—such as particular employees or departments. This way, callers are more likely to reach the people who can help them. A hunt group is another voicemail feature: If one employee does not answer their phone, it redirects calls to another phone line in your business and can keep trying all the lines you have. It will only direct calls to voicemail if no one answers their line.

Last, make sure you keep this voicemail account up to date, especially if you have some kind of "out of office" message, telling people where you are. Michael Hyatt updates his voicemail message every day-- it may seem excessive, but it lets his callers know that he regularly checks his voicemail, cares about messages he receives, and is likely to get back to them.
But professionalism also means paying attention to detail. Imagine if you were to leave a voicemail without mentioning any of the following: • Your full name. • Name of the recipient, if important. • Your company name. • What it’s regarding. • Phone number for the call back. • Brief message.