How on earth do you manage that many at one time?
Depends on what you mean by "manage." If you mean, how do you open a tab to a new article, say you're going to read it later, or maybe read a few paragraphs right away and plan to finish it later, then never look at it again, it's easy!
Many of them, of course, I do read. But unfortunately the internet has far more interesting reading material than I have time.
And I must not be the only one. Here's a post I wrote on Twitter in 2012 that has been retweeted 3,300 times.
"Like many writers, I have rituals. Before writing, I pour coffee, open the window by my desk, and attempt to read the entire internet."
This sounds self serving and I don't mean it that way, but sometimes I wonder if I'm interested in too many things.