If you crochet or knit you know that when you have to add a new color or a new skein of yarn you have to know the ends and then weave the cut ends into your work.
While this method works there are many time that after washing the ends work themselves back out and you have to sit and reweave them back in again.
This Russian join method shown by Twisty yarn shop eliminated the loose ends. You actually work the yarn ends together and they leave no long ends to be worked into the piece.
Very nice tip.
Russian Join
http://twistyarnshop.blogspot.com/2009/05/russian-join.html
Learning K17380.001 Knitting Teacher Kit
DVD No Rules Knitting at the Teen Knit Cafe Kit (Leisure Arts #46758)
Learning K17370.001 Crochet Teacher Kit
I Taught Myself to Crochet