The first rule in a real estate brokerage business is GET LISTINGS! As many other speakers before me have said, "List to last!" As you remember job one, it is important to understand that you can control more listing sides than you can control buyer sides...
When a real estate agent gives a lender business, I believe that the lender is obligated to do more than close the loan. Building long-term relationships by utilizing the information to build name-recognition with that closed client, their friends, and their family are paramount to building a database! This classic host/parasite relationship always works because both parties receive benefits...