Back in April, I wrote about a simple idea that the NY Times had implemented to keep you on-site.
Now, it's Reuters with a non-invasive way to keep you coming back.
Simply mouse over any headline on the front page and you can save the article for later reading. More importantly, you can do it without logging in.
Of course, if you're in the habit of clearing cookies, you'll probably wipe these out but I seriously doubt most web users do (otherwise most affiliate programs simply wouldn't work).
It's little ideas like this, that don't invade the user experience but add value, that have the potential to make or break some online publications as time goes on.
You can check it out and see what you think at Reuters.com here.