Busy professionals are so awash with information, much of it irrelevant or uninteresting, that they rarely have time to go back and sort through it all and make sense of it. Instead, all this stuff ends up occupying storage space or sitting somewhere in the cloud. Well, I undertook a project to dive through an archive holding fifteen years worth of information on DVDs stored in a closet, and I learned a lot about what it means to gain, sustain and use expert knowledge.