Start out by wrapping the yarn around your fingers. The more fingers you wrap it around the bigger your pom pom will be. You could also wrap it around a piece of cardboard or any other object that you could easily slip it off of. I wrapped it around about 35 times but if you want a fluffier pom pom then keep on wrapping.
Once you finish wrapping it, slide it off your hand, making sure to keep it in an oval shape.
Then take a second piece of yarn and tie it tightly around the center.
Then you will take your scissors and cut the loops on each side, this will give it it's fluffy appearance.