Start by putting the scarf around the front of your neck so the ends hang in back.
Wrap the end around to the front and loosen the loop so that its comfortable around you neck.
Cross one end over the other and tie a knot.
Make sure the end of the scarf hanging down in front is a bit longer than the end behind it, and make sure the longer end covers the shorter end.
Adjust the first loop so that it covers the knot and creates a tail in the front.