Keep your ears wide open as you walk around. Joining a conversation with people you don't know, can be INSANELY nerve-wracking, but if you hear topics you're passionate about, it's much easier to join.
So, as you wander, actively listen as hard as you can, because those conversations can wind up being your best experiences at the conference. They also lead to making amazing connections that can give you social, personal and professional benefits for years and years :D
With that being said, after you hear a topic, you should feel free to jump in. Most people attending a conference will welcome you into the conversation. I'm very bad at jumping into a conversation, but I ALWAYS get something good out of it when I get my courage up!
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