Peg - What I do to see everything in one place is I created a catalog in Word. Just a table, I copy the image of each die or die set from the manufacturer's or a store's website, paste it into the table, and type the brand and the name of the set underneath, also sometimes the style of die so I know which box to look in. I organize the images into themes - so everything that's a basic shape, label style, or journalling type shape is all together. All the christmas ones. All the halloween ones. Trees and flowers and grass and other foliage. Etc.
Since I have many different types and sizes of dies - Nesties, Sizzix Bigz, Sizzlets, border dies, Sizzix alphabet sets, Quickutz 4x4s and 2x2s, and assorted other flat dies - this catalog system makes it easy to see everything at once without having to pull out a dozen different boxes.