I want to mark the last visible item before paging down. Then I immediately unstar it, so a shortcut to do that would be cool, too.
Any other suggestions for accomplishing this task are appreciated, too. It saves a lot of time searching for where to start scanning titles again, as this point is often not near the top nor in the same place each time.
The problem with starring/unstarring with the mouse: those stars are small targets, and if I miss, I often open the RSS feed item instead. A keyboard shortcut would be much easier/faster.