I just discovered this 2007 article from Paul Graham. He said something that I've vaguely thought of before but I've never even come close to articulating it this well.
We all have lots and lots of stuff. We like to think that it's valuable because we'll use it one day. It's not. It's worthless.
What I didn't understand was that the value of some new acquisition wasn't the difference between its retail price and what I paid for it. It was the value I derived from it. Stuff is an extremely illiquid asset. Unless you have some plan for selling that valuable thing you got so cheaply, what difference does it make what it's "worth?" The only way you're ever going to extract any value from it is to use it. And if you don't have any immediate use for it, you probably never will.
Companies that sell stuff have spent huge sums training us to think stuff is still valuable. But it would be closer to the truth to treat stuff as worthless.
After reading this, I'm ready to go through the house and to start tossing "stuff".