As a marketing or even simple communication tool voice mail is pretty dead. The telephone, a form of communication that has received only minor tweaks in the last 100 years, just doesn’t provide much to like these days. My perfect telephone would have a status feature, like IM, and transcribe all calls and responses and store them via email.
If you ever call me you’ll notice that I suggest in my voice mail message that you send me an email, so there’s a pretty good bet that if you leave a message the barrier to a call back might be high. It’s not that you’re not important enough, it’s just not how I work. If you’re calling someone because you have something you would like to sell them, then you better not commit one of the following sins or you can forget about a call back.
No reason for call
This is one of the worst. You call someone and say, “hey Bob, this is Sandy, give me a call.” Even if Bob and Sandy are best buds this one is a crime. There’s a good chance that Sandy just needed to know what time the meeting is today and should leave that info for one of a dozens possible ways that Bob can respond. If Sandy really wants a call back because she wants to sell Bob something, then this borders on silliness.