Presentations at User Groups and other events are great for connecting with the developer community. After giving a presentation, you should always follow up with a few attendees to get feedback, find out what projects they’re working on, and potentially how you can help.
Pick a few attendees at random to follow up with, give them a call and ask if you can buy them a coffee. You should ask them:
Read how this rule is also useful for account managers on Do you follow up course attendees for consulting work?