What do you KNOW for sure?
Look at your last 10 listings taken, listings sold, buyer sales.
Write down where you found that person.
Write down what you did for follow-up. Phone, in person, mail, text, social media, other?
Write down how LONG you did it before you got a signed contract.
Now you know. For sure.
What it takes to get another one.
DO WHAT YOU DID BEFORE THAT WORKED.
Pick 2 of the methods and start again NOW. This 28 minutes. NOW.