You have one. I have one. Everyone has one.
The dreaded pile of books "to be read."
No, dreaded is the wrong word. It's a pleasure to have that stack available. Because you never know what you might want to read next, right? It could be that historical biography, or perhaps a novella. Maybe it's a celebrity memoir or the hottest YA novel. In other words, the "to be read" pile represents a world of possibilities.
But what do we do when it gets unmanageable? Because it will, eventually, become so large as to seem insurmountable. Perhaps you found a ton of books on sale at a library or flea market. Or maybe you've rediscovered some cache of volumes you put aside years ago. Suddenly, there is nowhere to store all of them.
Personally, I am a fan of culling: sitting down and being honest with myself about whether or not I will ever get around to a particular title. I've impulse-bought more books than I can count, and it's important to me to reevaluate from time to time, in case I realize that a certain topic isn't really the best thing for me to explore.
In an ideal world, there would be enough time for us to read everything that interests us. But we live in an imperfect place where time isn't as abundant as we would like--or need--it to be. We do the best we can, including tackling that pile to the best of our ability.