Really think about it – You’re out of the office, it’s after business hours, or you’re otherwise indisposed, whatever the case may be, your voicemail is now tasked with representing you (and/or your company). No pressure, right? Your voicemail message is a platform that represents you to callers; therefore it’s ABSOLUTELY crucial that your message is perfect.
Once you have your message, you need to actually record it. The exact process varies depending on whether you’re using a cell phone or office phone, but here’s the basic process: Press the voicemail button, or press and hold 1 on most cell phones. Enter your password. Record your message. Listen to the message you just recorded. Follow the prompts to save your message. Following Up on Voicemail Messages

When you’re closed for the holiday, it’s good to forgo your usual out-of-office greeting for a custom holiday message. Keep it cheery and brief, and be sure to let callers know when you’ll resume normal business operations.
Expand your opening to with 'Thank you for calling [insert company/individual name]' or 'You've reached the voicemail of [insert company/individual name]'. This personal touch goes a long way towards building a rapport even when you're not available to answer the call directly.