Holding the Yarn
Here's one way to hold the yarn. Feel free, however, to do what feels right for you.
Holding the slip knot in your left hand, twine the yarn through the fingers of your right hand.
Moving the slip knot to your right hand, lightly hold the knot between your thumb and middle finger as shown.
When you crochet, you will use the section of yarn that runs between the hook and your right index finger. (D24)

Your index finger will move up and down as you work to create an even tension or tightness in the yarn.
Crochet Lessons ©1997 Crochet Guild of America, Diagrams ©1990 TNNA