On the left hand Explore section and in the Recommendations section inside Browse for Stuff, we show you a few feeds you might be interested in, but aren't subscribed to yet. You can get more recommendations by clicking the View all link next to those recommendations, or by clicking the Discover link in the sidebar.
You can preview a feed in Reader before making a decision to subscribe or not; just click on the feed in the list of recommendations. There's also some extra information about the number of subscribers to the feed and approximate posts per week. If you find a feed you like, just click the Subscribe button to add it to your reading list. If you've decided you're not interested in one of the feeds, just click No thanks to take it off your recommendations list.
Your recommendations list is automatically generated. It takes into account the feeds you're already subscribed to, as well as information from your Web History, including your location. Aggregated across many users, this information can indicate which feeds are popular among people with similar interests. For instance, if a lot of people subscribe to feeds about both peanut butter and jelly, and you only subscribe to feeds about peanut butter, Reader will recommend that you try some jelly. This process is completely automated and anonymous; your personal information will be protected in accordance with our privacy policy.