I currently have 253 subscriptions in Google Reader. I can’t say that I read each and everything that passes through, but there are certain RSS feeds that I do pay closer attention to than others.
Do you ever open up a newspaper and scan the headlines? Then perhaps you read the byline to get a little more behind the story, and only then do you decide to actually read the rest of it. There are many times when I use it in that capacity, especially when it comes to various feeds from news organizations that crank out a lot of items in just a few hours.
This is how I keep on top of things, even if it’s just a quick glance.