Excellent post! Taking a picture of items with sentimental value is a great idea! I do that with some of my kids' art projects - the ones that are too bulky to store. Donating still useful items is also a good idea as sometimes we hoard things because it seems like a waste to throw away things that can still be useful. We also try very hard now to buy less things from the get go because it makes life so much simpler.
RE: The Anxiety of Clutter