I recently discovered that one of my hometown papers, The New York Post, has an interesting little feature that you'd never notice because they call exactly zero attention to it—you have to stumble across it. Here's how it works:

Say you're on a story page reading about the recent Roy Halladay trade and you want to share the link with your friends along with a quoted passage from that article. You select and copy a passage, and when you paste it into your email client, here's the text you get:

So, on a day when Halladay moved closer to being a Phillie, Lee was on his way to Seattle, Lackey took a Red Sox physical and the Yankees' World Series MVP is headed to the Angels, the Bombers were winners.

Read more: http://www.nypost.com/p/sports/yankees/xmas_gift_to_yanks_roy_is_out_of_...

Neat that they automagically added a link to the article, right? There's something a little weird in terms of the order in which they reveal the functionality, and I haven't decided if it's totally awesome or is something that's almost too clever for its own good. They could get around it by giving you a little JavaScript overlay the first time that alerts the user of the feature.

Either way, I think it shows how you can offer more functionality, context, etc., to the user without demanding more of them and that might ultimately change their behavior in the future. It only takes one time for users to know the feature's there and in the future they can really speed up their interactions with the site.