* All the posts you've emailed to your contacts:
http://www.google.com/reader/view/user/-/state/com.google/tracking-emailed
* All the posts you have marked as unread at some point (to keep a post unread, you need to uncheck "Mark as read" from the options bar; note that "Mark all as unread" will not maintain this state):
http://www.google.com/reader/view/user/-/state/com.google/tracking-kept-unread
* All the posts you have marked as unread and are still unread (Google Reader calls them "saved items"):
http://www.google.com/reader/view/user/-/state/com.google/kept-unread
* Did you click on a post's main link to go to the original location? You'll find it here:
http://www.google.com/reader/view/user/-/state/com.google/tracking-item-link-used
* Did you click on a link from a post's content? The post should be included in this list:
http://www.google.com/reader/view/user/-/state/com.google/tracking-body-link-used
* If you use the list view, you can find the list of posts you've actually read (or at least you have clicked on the title):
http://www.google.com/reader/view/user/-/state/com.google/read
* Are Google's recommended feeds interesting? Check the list of recommended feeds you've subscribed to:
http://www.google.com/reader/view/user/-/state/com.google/recommendations-subscribed
* Did you accidentally dismiss a recommended feed? You'll find it here:
http://www.google.com/reader/view/user/-/state/com.google/recommendations-dismissed
