Sort of like putting the most important information above the fold in a news article, you have to front-load your voicemail with the most compelling and relevant information. Stating your name and company is not compelling, and it’s not as relevant as what you can do for the contact. What the person hears is, “I’m a salesperson and I want your money.” That’s the quickest way to get your voicemail deleted.
Approach voicemails with a scientific outlook, and score each one. Create a score sheet with a rating system that addresses the following: Would you save that voicemail? Would you return that call? Would you return that call right away? Are you missing the basics (alternative phone number, optimal ways to get in touch, a fallback person to call)? Did you craft it or wing it?

Unfortunately, not all phone numbers can be dialed: Slydial doesn't work with landline phones, third-party voicemail services, VoIP numbers, or prepaid mobile phones. If you subscribe to one of the premium plans, you can eliminate the ads on the service and send messages to multiple contacts at once.
Use your regular, normal voice – not too excited, not too subdued. Talk how you’d talk on the phone with someone you like but who doesn’t make you nervous. Communicate ease without flippancy and importance without exuberance.