Pan for action
To pan, make sure that the camera's shutter speed is low enough to blur the background, but not so slow that camera shake ruins the shot. I recommend trying either 1/15 or 1/30 second.
To get ready for the photo, start tracking the moving subject in the viewfinder while it's still off to the side, and turn your body in a smooth motion as the subject crosses in front of you. As it reaches the point closest to you, gently press the shutter release and continue to pan with the subject as it moves off in the other direction. For the best results, you should follow through, in much the same way a golfer or a baseball player keeps swinging even after hitting the ball.