Go for professional but interesting, and so long as your personality isn't so foul that it scares of syphilitic warthogs, you stand just as much a chance as anyone else with getting groupies. Learn to listen . This means shut up and listen to what everyone else has to say. If you have questions, ask them, but don't go spouting off about how editors don't want your magnum opus unless you're sure that everyone else wants to hear about it. Just listen and learn, and act on the little pearls of wisdom down there among the pig crap.
Free stuff is a good thing.
Don't go around yelling the URL and expect everyone to write down a URL as long as your arm. Instead, hand out flyers with the URL and all of the other pertinent information on your career. It won't necessarily lead to a 12-book deal right off the bat, but the idea is that people will remember your name and associate it with getting interesting material. Continuing with the analogy, try any number of other freebies. Buy copies from the publisher and give them out to interested bystanders.