Promote your business to the callers while they're on hold. Inform them of your range of products and services, their benefits and how they can help them. Or just re-enforce your branding with some pleasant background music.
An integral part of Job Search Central is the effective use of voicemail to take your calls when you are not available. Imagine your future boss being greeted by your voicemail greeting and then answer this question: will it enhance or detract from what they think of you? If it is the latter, change it. Otherwise, your future boss may end up being someone else's future boss.

Before you record a professional voicemail greeting, you may want to consider the type of people who might call your home or business. That way, you can think about the information these callers might need before you compose your greeting. Most callers are familiar with how to leave a voice message, so try to avoid giving them instructions. Some things you may want to include in your greeting might be your full name, title, name of your company, and an alternate method of reaching you. If you plan to be unavailable for some time, it can be a good idea to tell your callers when you will return and give them the name and phone number of another individual to call in the event they need immediate assistance. A private voicemail box enables a person to receive telephone messages when the phone cannot be answered.
Your call is important to us and we will get back to you as soon as possible. Please leave your full name, contact details, phone number, and availability after the beep and we will call you back straight away. Thank you!”