A knitter can never have too many different cast on and bind off techniques in her arsenal - and there are a lot! This Stretchy Bind Off is very simple and is my favorite to use at the edges of shawls (which need to be stretched out in blocking) and on cuffs. It gives a nice looking chained edge, with plenty of give, and it bounces right back into shape.
A regular bind off has you knit the first two stitches. Here, you knit the first two stitches together through the back loops. You do this by inserting the tip of the right needle into the back of both stitches and then knitting them.