For me, it was the digitizing phase. Tearing apart a yearbook, page by page, and feeding it through a scanner? Taking a picture of something you got as a gift and donating the actual thing?
Sometimes an item exists just to be itself. A yearbook doesn't have any value if it isn't yours, or if you don't invest it with some. If you decide you don't want something, fine – but it seems very strange to keep around a formless simulacra of it.