In Western cultures, a tie is usually worn by men and knotted around the neck of a collared button-up shirt. There are many different methods of tying ties, but the Half Windsor knot is one of the most popular methods due to its simplicity and elegance.
To tie a Half Windsor knot, drape the tie around your neck so the wide end hangs down the right side of your chest. Extend the wide end 12 inches lower than the narrow end. Cross the wide end of the tie over the narrow end. Wrap the wide end of the tie around and behind the narrow end. Lift the wide end, and pull it down through the loop around your neck. Tug the wide end to the right. Pulling from right to left, bring the wide end over the narrow end. Lift the wide end through the loop of your neck, passing it behind the knot. Bring the wide end of the tie down through the front knot. Use both hands to tighten the knot, and then carefully draw the knot up to the collar. Fold your shirt collar over the tie, and fasten the buttons of the collar if you are wearing a button-down shirt.