Great to see how everyone here is tackling their stuff, I am impressed! Having a hard time getting rid of stuff myself, especially clothes and books.
Clothes: I do not outgrow them, they are good quality, and they are still mystyle, and I still like to buy something new every now and again, so my clothes collection just keeps expanding. I still have the same size as 25 years ago and still have some nice quality items from that time that I do not want to get rid of. I am now at the point that I will have to do the "one in, one out" policy if I buy something new, which has prevented me from buying new stuff for the past year. I still wear everything on a regular basis. Also a difficult point: souvenir/band t-shirts that are hardly worn but I want to keep for sentimental reasons but this is one stack of approximately 20 shirts so I am not going to worry over them. Still wondering what to do with 25 pairs of socks given away for free on airlines. Not good quality but good enough for wearing/washing 4 or 5 times before falling apart. Not sure a thrift store would be happy with them, as they are such poor quality. They look lovely stacked the Marie Kondo way but as I never wear them (no socks or high quality hiking socks when hiking), I should absolutely get rid of them. Note to self: leave on airplane in future, even though free socks appeal to my frugal mindset.
Books: I love re-reading books and in the past was very choosy when buying books, so the majority of what I have I do not want to get rid of. However I now have 7 bookcases full and also need to start applying "one in, one out". To soften the blow I will just move a couple of boxes of books to the attic, and decide on them later. Not true de-cluttering but hey, books!
I have a very limited amount of knick-knacks, and most of the ones left I have been given when I was young and they hold sentimental value. Everything without sentimental value has been given away to thrift stores by now so I am quite OK on that front.
I would welcome all tips on how to sort/store DIY tools. I have my electric tools in small cases, neatly labelled and stacked on shelves, but I have a ton of screwdrivers-not-part-of-a-boxed-set, hammers, tape measures, screws, saws, pliers, plugs, hooks, sandpaper, paintbrushes, electric plugs and wiring etc. and I have not yet found the perfect way of sorting them. I have no garage so everything has to fit into Ikea Pax cupboards.