Getting to the Referral Stage with a New Contact

People often ask me how to move a relationship with someone they just met to the point where the new contact feels comfortable passing them a referral. I always say that the best way to get to this next referral-passing stage depends in part on how you came into contact with a person in the first place.  Let's say you met while giving a brief presentation to a group of people who are in your target market.  Assuming you did a good job, then you absolutely have the possibility of receiving a referral, even though you just met.  Why? Because ...