Start the thread on the hook and let the bobbin hang free. Take a length of wire or tinsel and lay it underneath the hookshank with the end finishing just behind the hanging thread. (Not in front of the thread).
Continue winding the thread down the hookshank, catching in the wire or tinsel as you go. Check the position of the wire or tinsel after every few wraps, if its moved upwards then unwind the thread and repeat.