How to Knit a cable cast on
This instructional knitting video demonstrates how to knit a cable cast on. Start by making a slip knot with a 6" tail and place it on the left-hand needle with the working yarn coming from the back. Knit a stitch in the slip knot loop, but leave the slip knot on the needle. Give the new loop a half-twist and place it on the left-hand needle. You now have the first two stitches. For all subsequent stitches, knit each new loop between the last two stitches on the left-hand needle. Cable cast ons create a tightly woven border which is very good for knitting ribbing.