Knot How-to Videos:
YouTube video of the Lark's Head Knot
YouTube video of the Double Half-Hitch Knot (or "Two Half-hitches Knot")
YouTube video of the Taut Line Hitch Knot
YouTube video of the Square Knot
YouTube video of the Cat's Paw Knot
Materials:
Rawganique - Unprocessed hemp, jute and flax rope by the foot and by the spool.
Kinbaku Studio - Lots of finished, small-quantity rope at a "reasonable" price
The Twisted Monk - The most trusted name in bondage rope - incredible selection, Seattle-based
Amazon - Link to the ribbon I use for bondage