My TMNT comic book collection.
My Monica Hughes books.
These two items take up maybe 4 boxes. It's like, less than 10% of all the stuff I own. They also are among my oldest things, gathered over a 15-20 year span for both.
So basically if I keep at myself doggedly and remind myself that those are the two things I don't want to part with ever, at least not at this moment in my life, I should be able to dump the rest like hot potatoes, right?
*crickets chirp* Well, it's an idea anyway.