Keep it Brief. Time is money in business, so if your voicemail is long, chances are the caller will simply disengage before the cue to leave a message even sounds. Keep your voicemail short. The most should be around 30 seconds, and even that’s pressing it. We’ve grown into a country where our attention span can last only about 10 seconds in some cases, so keep it short, brief and to the point. Persuade and Engage the Caller. If someone calls your business, they already have an intention. It’s the quality of your voicemail that plays a factor if they consider you a company they’d like to deal with. This is your chance to motivate someone to engage in a meaningful conversation with you. If your voicemail is shoddy, chances are they’ll hang up, or lose motivation to continue the call. In other words, your voice mail must engage and entice someone to the point that they care enough to leave you a message.
“Leave a message! Dit dit dit dit dit, dut dut. Dit dit dit dit dit, dut dut… After the beep.”

“You’ve obviously reached this message in error because I don’t want to talk to you or anyone else for that matter. Now go lick your butt or something.” “Hello, My Name is Angie, and I’m a Cat-Huffer” Cats and Bags: 2 Very Important Scientific Experiments The Pros and Cons of My Cats as Health Care Providers
Another way to make up funny voicemail messages is to act like a device has come alive. For instance, you could say,"Hello, I'm Bob's hair dryer, and I've taken over because I'm way more interesting. If you'd like to leave a message for him and have your hair dried at the same time, just hold up the phone." Answering like an answering machine, a microwave, or refrigerator and using the functions of that device in the answer are easy ways to create a fun voicemail.