If you're the kind who likes to chat and are willing to spend a couple of hours a day interacting in real time with visitors and customers, you might like to add a chat room to your site.
For those not in the know, a chat room is a "virtual room", something like the tag-board window you see on this blog. The difference is, messages must be in "real time", meaning, you and the person you're chatting with must be online and at the "chat room" at the same time. Messages aren't usually saved in chatrooms so you can't leave a message for someone the way you can with a tag-board.
However, nothing beats a chat room for interacting one-on-one or one-to-many or many-to-many in real time.
Sigmachat is a really cool piece of software that allows you to add a java-enabled chat room to your site / blog. You don't need administrator privileges or even a blog or website to have your own chat room! Sigmachat has a free, hosted version where it will host the chat room for you. Several chat room features, such as "ignore" (valuable when some ass is creating trouble in the chat room) and "private chat" (go one-on-one with a valued customer to solve a problem) are available even in the free version. The paid version gives better administrative control such as room moderation (to boot trouble-makers and even ban them for specific periods of time).
Try it out, you have nothing to lose.