Watch this knitting instructional video to learn how to do the knitting 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.
Hope this knitting demonstration video helps you with your knitting cable cast-on! Soon your knitting technique will be flawless.