If you like to keep things simple, opt for a basic greeting. Most voicemail options allow you to record just your name, which lets callers know they’ve reached the right person.
Some people try to get really fancy with their voice mail greetings and they will put the current date on their message. This requires you to update your voice mail greeting daily. This level of customization is completely unnecessary and often leads to problems when the user forgets to update the actual date itself. However, updating your outgoing voice mail message to reflect a particular season or holiday can be a nice touch as long as you remember to change it accordingly.

Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.
If you have a business VoIP phone system that offers an auto attendant feature, you should be able to create a phone menu fairly easily. Be sure to state which key the caller should press to select an option on the menu.