These days, there are five types of knots that are the most popular:

     The Four In Hand Knot
     The Windsor Knot
     The Half Windsor Knot
     The Pratt Knot
     The Bow Tie Knot
     The Four In Hand Knot

    Also called a Schoolboy Knot or a Simple Knot, the Four In Hand Knot is considered one of the most basic and simplest ways to tie a tie.

     Begin by placing the broad end of the tie at your right side. See that it extends about 12 inches lower than the thinner end of the tie. Take the broad end and pass it over the front of the thinner side of the tie. Then bring the broad end up and pass it through the loop that forms. Now, pass the broad end down into the loop in the loose knot in front. Then, holding the thinner end grasp the loose knot and slide it up to form a snugly fitting, neat knot.

     The Windsor Knot

     With its wide and thick triangular knot, the Windsor Knot projects a sense of self-assurance, hence it is ideal for interviews for jobs, making office presentations, attending corporate meetings, and so forth. It is best worn with shirts that have collars that are spread out.

     As in the previous knot, start by putting the broad end on your right side, extending it 12 inches lower than the other end. Putting the broad end across the thinner end, turn it and and take it up into the loop. Then take the broad end down and twist it behind the thinner end, pulling it toward your right. Then take the broad end and cross it over into the loop again, and bring it back up from behind and put it through the loop of the knot in front. Pull the broad end down gently, and holding the narrow end of the tie tighten the knot, drawing it up toward the collar.

     The Half Windsor Knot

     This tie knot is triangular in shape, and forms a symmetrical and snug shape. You can wear it with any kind of shirt. The knot looks the best with ties that are broad and made of light material.

     Begin as usual with the broader end of the tie on your right side, extending it 12 inches below the thinner side of the tie. Put the broad end across the narrow end, looping it back under it. Then pull the broad end up into the loop and bring it down through the knot that forms in front. Firmly tighten the knot, pulling it up toward your collar.

     The Pratt Knot

     Also called the Shelby Knot, this knot is best with moderately wide ties and is suitable with any kind of dress shirt.

     Begin by placing the tie upside down around the nape of your neck, with the broad end beneath the thinner side. Then take the broad end and put it across and beneath the thin end again. Pulling the loop down, tighten it. Now, take the broad end across toward your right. Then pull the broad end up, and put it toward the rear side of the loop. Then, pulling the broad end through the knot in front, tighten it gently, pulling it up snugly toward the collar.

     The Bow Tie Knot

     The Bow Tie Knot lends the wearer a dapper and spiffy appearance. It is usually worn for formal occasions, like for a wedding. It goes best with a tuxedo.

     Put the bow tie around the nape of your neck so that one end, say we term it X, is about two inches lower than the other end, which we will call the Y end. Now, put the X end across the Y end. Next, take X end up and place it under the loop. Then fold the Y end over itself, forming the base bow of the tie. Now, loop the X end across the loop’s center that was just formed. Hold everything firmly, and double up the X end back into itself, poking it through the loop under the bow tie. Tug the ends of the bow tie, straightening the central knot, and adjust it so that it fits snugly in your collar.

      Opinions differ on which tie knot is the best choice to be worn. Generally, it is a personal choice, so pick the knot that you like the best, and are most comfortable tying and wearing.

     Get more information here.