OK, I was on here (briefly) quite a while ago to say I'd got started. Then RL intervened
and Kondoing just ground to a halt while I dealt with that.
But things are calm again now so I'm back at it and having a big push before the summer holidays. I've sorted -
our medicine box
cleaning stuff
our toiletries
bedding - I worked out some of our duvet covers are at least 12 years old so that's why some had started getting holes in
duvets and pillow - ALL our pillows failed Anthea Turner's pillow test
my reference books
my stationery - it seems I rather like collecting notebooks - to admire, rather than use 
our cookbooks
my paperwork - ugh, that was a HUGE job
I'm not sticking to her order, but I am tackling the whole category at a time, which I think is the important thing. And I've reorganised the shelves in our cupboard under the stairs (using boxes and baskets that turned up around the house as I sorted, of course
) so the things we use the most are nearer the door - it's lovely getting things in and out of there now.
I am finding it physically tiring and sometimes mentally exhausting, but I feel energised by it too, so will definitely carry on. I have the checklist someone linked to before (sorry, can't remember who) that broke the categories down into lots of small sub-categories and I'm really enjoying crossing things off there when they're done.
I'm also earmarking one of ds1's days off over the summer holidays to help him sort through his room. He has at least 3 large boxes under his bed that are full of who knows what ... He doesn't seem particularly excited about the prospect but I know once it's done ds1 will enjoy being able to find his things more easily.
Phew!