If your customers feel that you don’t care, they’ll take their business elsewhere. Experiences are the differentiating factor between businesses. Big efforts to improve the overall experience in tiny ways by crafting a voicemail greeting script can make a huge difference when customers are asked by their friends and family how easy it was to work with you. And word spreads quickly in the age of social media. The more positive experiences you offer, even when you’re not available, the more likely those people will call back.
Callers aren’t going to spend time sitting through a menu that doesn’t let them, at the very least, leave a voicemail. If a caller knows their party’s extension number, an option can, and should, be “Press 1 to leave a voicemail,” or something along those lines. That way, clients can feel as if they’re expressing their concerns without needing to talk to an agent, and without the agent feeling sorry they couldn’t pick up while they were working on something else.

The message needs to be clearer than glass. No shuffling papers or dogs barking in the background. **Professional. **Your phone greeting needs to sound like you're a real company, not a random person answering their cell phone. Thought-out. Companies suffer when their founders don't think carefully about phone interactions.
Most answering machines have a digital display that allows you to see if you have any messages and how many. Choose a model with a large, illuminated display so you can easily read it, even from a distance.