Third, make sure your message begins at the beep. If there is a beep, a few seconds of lag time (you trying to find the right number to hit to commence recording), and then the message from you, your potential client may hang up the phone because they thought it was a blank voicemail. Spend time working on your voicemail.
Expanding on the simple approach above, let the caller know who they've reached. This will not only eliminate people leaving voicemails by mistake, but it will reassure the caller that they have called the number they intended.

For those with voicemail greetings that get changed about as often as a new president is elected, know that this is doing a serious disservice to the caller-recipient relationship. It signals to callers that the business is anything but an authority, most likely not very detail oriented, and has questionable overall credibility and competency. Those aren’t traits that any business wants to associate itself.
Your callers should get a different phone prompt greeting when they call outside of business hours. This will let them know that you are closed, when you’re open again and give them some options to act upon now, so they don’t feel like they’re totally wasting their time. For example, you can send them to your website where they can find information they’re looking for or allow them to leave a voicemail message to someone specific within the company.