Seriously one of the best tutorials for the sliding knot closure.
How to Tie a Sliding Knot Bracelet - THIS IS FOR ME, A DEFINITE ' NEED TO KNOW'
whip knot...to stop rope ends from untwining but also used in macrame to group cords together
How to tie a bracelet so that it can be loosened and tightened easily
Useful - how to tie a sliding knot!