I had 178 feeds in Google Reader. That's a lot of reading but I knew that some of the feeds were not current and no longer posting. I wanted to get rid of some of them. I hoped that there was a way to do so. There is. I Googled it.
I found a web apps help page. Basically, the solution involves using the trends section of Google Reader. I won't share more than that because it isn't my idea and I want to give Chris K. his or her credit on the Web Apps page.
My Reader is now down to 140 feeds. Still a lot but they are current.