Many busy businesses utilize auto attendant greetings to make a great first impression, however, if your business relies on the personal touch of a live receptionist, it is important to have a plan in place when that position is unstaffed. Make sure your voicemail greeting contains the useful information that your receptionist would normally provide. This could include: location & directions, office hours, website URL, or social media info, as well as any pertinent company information.
You’ve reached the (name) family. We can’t answer your call right now. So why don’t you leave your name, age, sex, height, weight, phone number, a short message, your social security number, credit card number, how many kids you have, your mother’s maiden name, along with the date and time you called us. And if you’ve survived this message and are still listening, your message better be important.

A relatively unprofessional one — like mine, for instance — does the opposite: It encourages prospects, recruiters, and potential connections to run in the other direction.
Are you a "Gone With the Wind" fan? Then you'll want to copy this one, which Anne S. Kight has been using on her home machine for years. In the background, you hear the swelling overture from GWTW. After a few seconds, a gently accented southern voice says: "As God is my witness, I simply cannot come to the phone right now. So please leave a message, and I'll call you back -- tomorrow. After all, tomorrow is another day!"