Before a knit stitch
Step 1
Yarn over backward (bring yarn from back to front over right needle), then knit 1.
Step 2
On your right needle, pull stitches 2 and 3 over stitch 1; one stitch bound off, one stitch on right needle.
Repeat
Repeats Steps 1 and 2 as established until all stitches are bound off.
Before a purl stitch
Step 1
Yarn over normally (bring yarn from front to back over right needle, then to front again), then purl 1.
Step 2
On your right needle, pull stitches 2 and 3 over stitch 1; one stitch bound off, one stitch on right needle.
Repeat
Repeat Steps 1 and 2 as established until all stitches are bound off.