Thank you for my copy of the book.
I'm not very far in yet, but I did the quiz and am definitely suffering from stuffocation. Which I knew already because our house is far too full of stuff.
Our big problem is that nothing seems to have been put away in the right places, meaning the stuff that should be there is somewhere else, displacing something else which in turn is displacing something else.
For example DH left his tool box and car trolley thing in the cupboard under the stairs, so I can't put the hoover away any more, so that's in the dining room blocking a cupboard door but it can't go in the cupboard because the Christmas decorations are in there instead of in the loft, because to get the loft ladder down we need to move DS's bed, which is difficult because DH stored a load of toy boxes under it because he'd put other stuff on the shelves they are supposed to go on.
We're in kind of a vicious circle of too much stuff, each being put in the wrong place because something else has been put where it ought to go because we've got too much stuff and not enough places to put it.
I was a bit skeptical that adding an extra book to the couple of thousand we already have was going to help, but it has given us a bit of a push to do something.
I have just found three books I'm happy to give away, so I'm taking that as a start. 
DH has just dismantled the massive trampoline which was too big for our garden, and is giving it away as we speak to someone on a Buy, Sell and Swap Facebook page.
And a whole load of garden mess and shed rubbish has gone to the tip. Which now means we can put the stuff from the cupboard under the stairs back in the shed, the hoover can go home again, the cupboard is unblocked, and maybe the Christmas decorations will make it to the loft.
Progress! 