Deleting stuff you don't need from your hard drive so that you can download more stuff that you don't need.
Also, compressing files in various formats in an attempt to find the one that compresses best, so that you can download more stuff that you don't need.
Being ever so subtly annoyed when someone uses the term "MP3" instead of "MP3-player".
Being ever so unsubtly annoyed when someone uses the term "wiki" instead of "Wikipedia".