Of all the things you can do do elevate your BizDev game, the most valuable is this: follow up. Whenever you make a new contact, or reestablish an old, important one, in many ways the original meeting is less important than how you follow up. The idea is to make sure they remember you. Here's how you do it:
Immediately after the conversation, fire up Outlook (or whatever contact management system you use) and take notes. Do a core dump, and get everything you can recall about the conversation down. Otherwise, you will forget almost all of it very quickly, which drains 80% of the value from the meeting. In particular, get down the personal stuff. Next time you meet him (or her) being able to mention one very small, very personal detail from your previous conversation will have tremendous impact. Also, within 24 hours, follow up with a quick "I really enjoyed it/let's do it again" email. This helps fix you in their memory, which is equally important.
A week after the conversation, send a second, equally quick "thought you'd be interested" email that refers to something in the original conversation. If you need to do a little research to come up with something, do it. It won't take more than ten minutes, and if you spent two hours setting up, going to, engaging in and returning from a meeting with someone, it's a trivial incremental effort. For example, if the person you met with talked about her love for collecting early Barbie dolls, send her an article about the Mattel lawsuit over Bratz dolls. The idea, again, is to reinforce your presence in her memory.
A month after the conversation, email a third time. It can be a "thought you'd be interested" email, or a "why don't we have lunch again?" email -- either is fine. The point, again, is that by following up, you make sure that you're remembered, which is the entire point.
Remember -- it's not what you do. It's what you do after you do what you do. Or something.