In the spirit of not jinxing my team, here's a bit of functionality from NBA site's Boston Celtics landing page that aint too shabby.
We're familiar with seeing "Recently Viewed" items on the Product Page of a typical eCommerce site. The conversion metrics for Recently Viewed are higher than for cross-sells (sometimes called "You May Also Like," "Our Stylist Recommends," etc.). You're obviously more likely to purchase product that you've already considered as opposed to product that the site is recommending -- and it's best practice to provide both sets of related product.
I have not seen, however, "Recently Viewed" items displayed on a Landing Page, and I like it. Furthermore I did not log in to the NBA site, nor do I have an account with them. I had considered these items during a previous session, weeks ago.
There may be folks out there with privacy concerns who don't appreciate cookies being dropped on them without their clear consent. I'm not one of them. If I'm shopping online I don't mind a little reminder of where I was and what I did -- it saves me time. It even gives me the perhaps misguided notion that the Celtics are just as interested in me as I am in them.