Before you record your business greeting, make sure to write it down first. Finalize your script and then rehearse a few times before you record the final business voicemail.
For many of us, our professional voicemail greeting is a crucial first impression. For others, it might be something that our clients and partners hear over and over again. An unprofessional voicemail greeting reflects poorly on you, and while it’s easy to overlook, it’s just as easy to fix. Script it out beforehand. Make sure information is specific and up-to-date. Keep it short. Use a quality recording. Smile when you speak. Script your voicemail message

Here's the problem with recording elaborate joke messages on your answering machine: Your answering machine will become more popular than the person who owns it. Friends would tell total strangers to call my number and listen to the new goofy message. They would become disappointed if I actually answered the call first. I would have to hang up and let the machine pick up just for other people's entertainment. Dozens of people were finally calling my home phone, but few of them wanted to talk to me personally.
That’s why it’s important to clearly identify yourself and your company right out of the gate. And while it may be tempting to tack on your phone number, it’s best to leave it out. Restating your number takes up valuable time, and the idea here is to provide all the information your customers need—and nothing they don’t. Keep voicemail greeting up to date. Many voicemail greetings take the generic approach of stating the person reached, the company name, and a statement about being away from the desk or unable to answer. The problem here is the fact that your callers already know this.