I saw this blog a while back, and promptly forgot about it when something shiny distracted me. A timely post on BF reminded me of its goodness.
Stormdrane apparently loves tying knots, and has great videos, pictures, and written tutorials on how to tie all kinds of useful knots for turning paracord, string, wire, etc. into lanyards, straps, leashes, and other cordage based items. Go forth and learn!