I think I've crossed that fine line between stash and hoard. I admit I have a problem with craft stuff. When I say I've tried pretty much any craft out there and have all the stuff to go with it, I'm not joking. This week is my annual clean the workroom week. It used to take a couple of hours, a day at the most but now it's taking almost a whole week. Mind you, it is a very thorough clean. Each box is opened and the contents inspected carefully, box washed out with a solution of vinegar and water and then repacked. Books are taken off the shelves, shelves are moved to vacumn behind them, washed with water and vinegar, and then books are sorted and put back.
This year I've been a bit more ruthless. WIPs that I know I'll never get around to finishing were ripped out and rewound. Odd balls of yarn that I'll never use went into a bin to go out. Luckily, all the natural fibres can be composted so that's a good thing.
Tossed out are all the pretty boxes that I've collected that I might someday use in a craft. I found a ziplock bag full of pretty shiny foil that I had no idea I had.
The hardest thing is not to get sidetracked. As I go through the boxes, I find stuff that I've forgotten and it's like seeing old friends. You want to stop and visit. I have 12 large paper bags of fleece...all washed and some are picked. These bags are the big garden recycling paper bags and not your wimpy grocery bags. Yeah. I have a lot of stuff. I'm pretty sure I've stashed beyond my life expectancy.