I love when I go through my Madonna archive (don't judge), which stretches from 1979 materials (very few) to present (though 2012 on is light since I largely gave up on buying all the weekly celeb magazines), and I find doubles. Off to eBay! How I ever acquired not one but two of this very cool, in-house Warner Bros. Records mag called Word of Mouth from October of 1984, I'll never know. But I can't justify my love for duplicates, so it's going.
My dredging through my archive was to make notes for Encyclopedia Madonnica: 20th Anniversary Edition. It took forever! But now I just need to marry all my notes with the old text, add entries that for sure have to be added (like all her albums and singles and videos), and then stir until the mix is thick and resists the spoon.