Rehearse or write down your message before recording it. Remember that old saying “practice makes perfect?” It’s certainly true when it comes to creating an electronic greeting. The more you’ve rehearsed, the easier the message will be to restate. If you don’t have time to practice, writing down the greeting before recording it – and then reading it aloud from the paper – may help you stay focused on the correct wording.
14. "Hello, you've reached the Sales Department at [Company name]. All of our representatives are currently helping clients [insert goal such as, 'achieve 40% growth through streamlining HR operations'] and are unable to take your call. Please leave your name, company, and phone number and we'll give you a call back ASAP. Thank you!"

Continue to test voicemails as you score your results. For example, RingDNA finds the best times to call are 6:45 a.m. to 9:00 a.m. and 4:00 p.m. to 6:00 p.m. The worst times are Monday mornings from 6:00 a.m. to noon and Friday afternoons. Try different call times and see what works for you.
We've all heard that automated voice mail lady, telling us what to do after the beep. But fewer people than ever are leaving messages. And the millennials, they won't even listen to them — they'd much rather receive a text or Facebook message.