Here is my phone process when call fresh opportunities:
First Call made in the morning after 9AM. I get voice mail they get this message: Hi Ryan, It's Jerry Thibeau from ABC Motors, I have some great news for you, please call at your earliest convenience. I can be reached at 585-749-2015. If I don't hear from you this morning, I'll try you again later today.
Second Call is made late morning before lunch and dialed from my cell phone. If I get voice mail I hang up! Why do I hang up you ask? In case it's the cell number I am calling I want the customer to see they had a missed call and then when no message is left they'll be curious as to who called. many will hit the redial button, now I have them on the phone. Make this call from the work phone and the call might not get routed to you.
Third Call is a repeat of the second. Now the customer has two calls from the same number and they really get curious. If no reply, perhaps we have a home phone number which leads us to a fourth call.
Fourth Call dialed from the work number and after 6PM in case it's a home number we are dealing with. If I get the voice mail I will leave the same message as I did in call 1, but at the end I will say, "If I don't hear from you tonight, I will try you again tomorrow."
Then on day two I repeat this process. Some might say I am pestering the customer, but you can't say I didn't tell the customer what to expect. If a customer came in and complained that one of my reps called to much, I would apologize to the customer and then spiff the rep for doing a great job. When is the last time you had a customer complain about a rep calling too much. IMHO that doesn't happen enough in our industry.
The above will lead to a higher contact ratio!