Thanks to this thread I have spent an enthralling morning de-cluttering my chest of drawers, wardrobe and dressing table. To be fair, none of them was too bad, and every sock matched, but I am hoping it will inspire me to tackle the real clutter: books, art materials and paperwork (dreadful). I also found a book on the bookshelves by the woman who in my opinion, started it all: Dawna Walters, How to de-junk your life from the TV programme, 'The Life Laundry', about 2002. Unsurprisingly, she ran a company which sold storage furniture.
She visited people's houses with an enormous machine that sat in the front garden and ate the rubbish before it could be stealthily reclaimed, but she also presented sensible, sympathetic explanations as to why we hoard and find it so difficult to let go of certain things.