I have every cancelled check I've ever received, too. It didn't occur to me until right this moment that I could probably shred most of them.

This decluttering book doesn't, but my other favorite decluttering book does, mention the thought that your next of kin will someday have to finish your decluttering job. Clearing out a beloved person's home is not easy at the best of times. :-(

When I went to my grandma's place, to help her through her last few days, I found a desk calendar from 1928. New in box. My grandma was a heckuva clutterer. Pounds of old papers, envelopes that came with some offer or other and despite the printing on them "might be useful", half a bicycle...