This scarf tying method  is a bit more difficult to achieve than the others, but the results are well-worth the effort.
 
Drape your long silk scarf around your neck, knotting one side. On the side with the knot, leave about one foot (12 inches) of fabric hanging on one edge. Adjust the scarf so that the side with the knot is significantly shorter than the side without.
 

 
Fold the longer side of the silk scarf in half.
 


Pleat the lower half of the long side, from the top down.
 


Then, push the pleated portion of the scarf through the knot that is hanging on your other shoulder.
 


Unfold the pleated portion of the scarf.
 


once it is through the knot, and arrange to your preference.