This was a much more manageable problem when it was all in one place, Google had tags to organize your feeds with, and their magic sorting algorithm wasn't bad at all.

Now, if you haven't found any free alternatives that are as good, you've likely subscribed to some emails to keep up, go to the website often to check if anything is new, keep up on twitter/fb if there is a page/profile or just don't bother anymore with content you would actually have been interested in if it was easier to get. The most reliable reader I've found on Linux is liferea, and it works, but I wish it had pluggable sorting mechanisms, based on how popular an entry is.