The next clue is e-mail. This is the easiest way for your site to respond to your readers. It is the universal lanquage of the internet. Another clue is get personal. Use your name, and use your readers name.
Nothing is more powerful than personalization.
Make responding and following up to your communications a priority. Nothing should be more important than responding to your email. The most exciting and cutting edge site on the web will fail miserably if you don't respond to your e-mail promptly. Automate as much as possible. Make it easy for your readers to get and respond to your message.