Well, right now, DD gets most of the credit for all the decluttering going on in our house!
At this point in time, I believe we have gone through 90% of everything she owns.
Clothes - She donated enough to get everything neatly into one dresser from two (different sizes, but still) and into half of her closet from 2/3rds.
Toys/play items - She donated oodles of stuff of her own free will. The quantity left is very reasonable.
Arts/crafts - She went through it all with a smile today and gave away an entire box full.
Misc - She has literally gone through every single item in her bedroom, her closet, her areas of the family office, her section in the extra room, and two of three areas in the living room. The only spot left is the games & puzzles area in the living room. Guess we'll do that tomorrow...
Meanwhile, DH quickly scanned his hanging clothes and did a THOROUGH purge of his areas in the family office a couple months ago and is doing a "quickie" (LOL) again as I type.
I have been mostly helping DD, or rather I've been cleaning up after the little tornado! LOL In between her decluttering, I have managed to go through all the family linens and all of our "product documentation" (paperwork - warranties, care & use instructions, etc. - on items we own). I also went through our fire-resistant box and sorted out the important papers that have piled up since the last time I did it (almost a year ago). This all on top of the major overhaul of our storage closet, including Christmas decor, that I previously mentioned.
The net result of all this, thus far, is a HUGE MESS on our master bedroom floor!!!
I'm not counting, but I will take and share a picture of the massive pile that leaves our house on Friday, January 2!