How to downsize your book collection

I am in the process of downsizing all of my possessions.  

The challenge is that I do not want to get rid of stuff.  I look at the thing that I know I should get rid of, and I imagine how it might come in useful in the future, and then I end up keeping everything except a few obvious discardables.


Then I discovered the solution: Instead of choosing what to discard, choose what to keep!  For me, this change in perspective made a huge difference.