Open Question: Connecting with fans

All right!  Brainstorming time! Put on your thinking caps, cause it's time to use that noodle!  The question is this: what can I be doing better to connect with my fans?  And by fans, I mean people that read my books on purpose.  Very broad definition, I know.

I already reply to tons of email every day, make fun of people on Twitter, and comment on other sites here and there.  But is there something else I should be trying?  Some otherwise obscure idea that might work?

Email, comment or twitter.