The next step: instead of just gathering stitches, use the diagonel stitches shown here. One to one side, going over to the other side. Makes the gathering even.
When you have the length you want, pull the stitches tightly and stitch together, leaving a tail at each end. You might have to "fuss" with the ribbon to make sure the right sides are facing up. When attaching to a card, I hot glue one end, arrange the middle and glue.
For the gold ribbon, I attached the ends and formed a flower.