How do you organize a steam library?

I've had steam for over a year now and I've pretty much buried myself under a pile of backlog games.
While trying to dig myself out, a thought came to me. How does one organize their steam library?

 

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I've already started doing that, could take a while doing that. XD
I'm also kind of surprised Steam doesn't have some sort of auto categorization system.

 

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you can't organize steam. you can't even hold it. it's just there, in the air...

 

You could say, in the cloud.

 

I do it by genre, and sometimes I label games as "NEVER PLAY AGAIN", which is reserved for dead multiplayer games and Skyrim.