[psyklic]

The easiest way to get started is look around for others by themselves, then walk over and say hi. Realize they're likely feeling similar to you.

Every time you sit down for a talk, challenge yourself to sit near someone and introduce yourself. At lunch, find an empty seat at a busy table. As you do this, you'll see the people you met earlier and will feel more confident.

Also ask people if they know if anyone's gathering afterward. Nearly everyone will either invite you, tell you what they know, or be interested in doing something after too.