Do you know which page on your website is most often emailed?
You would if you made it easier to forward (use a tell-a-friend form or a link from sharethis.com).
You'd also get more people happily emailing your stuff to their friends (with their personal endorsement). That's as good as marketing gets: Free and credible.
Then, just count up the referrals and you know which pages or products are the most buzzworthy.
From the New York Times: | From the Onion |