My lightning talk was supposed to be talking about ack, my grep replacement, but as other people did their talks, I kept adding little notes of things I wanted to mention.
I try to remember that not everyone who does Perl sits immersed in it 24/7, or maybe even do it as their primary programming activity. I try to do as much as I can to let people know cool things they can do that they might not have known about, just by mentioning them.
Topics I covered:
Next time you're at a group, speak up. If you talk about something that might not be universally known, ask. "Anyone here not heard of del.icio.us?" The hands go up, and you can spend ten seconds saying "It's a public bookmarking site that lets you post your bookmarks where others can see them, and see what other people are bookmarking." It's easy to do, and there's no better way to help spread knowledge.