If you are using a square scarf, fold it in half so that you have a triangle. Position the long, folded edge across your forehead. You can flip up the edge to make a headband to frame your face, or leave it plain as pictured to the left.
If you are using a long neck scarf, position the scarf horizontally across your forehead. Again, you can flip up the long edge for a face-framing headband, or not.
Bring both long ends together and tie them in a knot. Make sure that the back is tucked in to form a nice edge.
Twist both long ends together and circle the twist around the knot. Once you complete the rosette, tuck in your ends. This picture shows the rosette on the side, but you can also wear it in the back. It's ok to use safety pins or clips to secure your scarf, but it probably won't be necessary. Pretty!