While both types of messages should be customized to a given buyer, voicemails should be ultra-specific. In an email, I might ask for a referral, an appointment, or feedback on a content asset they downloaded. These sorts of classic questions -- while still tailored to the buyer -- can be customized for reuse with another prospect, or another 100 prospects.
I've stressed it throughout this article, and I'll stress it again — your sales voicemails have to be concise and airtight. That requires being locked in on exactly what you're trying to get across. You can't go off on a series of tangents that may or may not apply to your prospect's situation. Keep your messaging as focused as possible.

Think through what you are going to say before you place the call. When men hear the beep, they often freeze up and forget what they wanted to say. If you want to be the go-to guy at work, then you have to exhibit competence on all levels. Don’t spoil your confident image by hemming and hawing and filling your messages with “uhhhhs,” and “ummmms.” If it’s a really important call, consider writing out what you want to say beforehand. If the person picks up, great, you now have some notes to remember what you wanted to talk about. If they don’t answer, you can leave a clear and concise message.
That's where Slydial comes in. It's a service that lets a caller go directly into a mobile number's voicemail. Even better, the basic service is free, and no signup is required to use it unless you need more functionality.