Appreciate the goalkeeper. Also called goalie, or keeper, goalkeepers are unique in that they are the only players allowed to touch the ball with their hands. They may use their hands within the penalty area to keep the opposing team from scoring.
Watch the defenders. Their primary role is to take the ball away from the offense and start the attack in their team's favor. Their secondary role is to shut down the attack of the opposing team.
Check out the midfielders. They are often among the most hard-working players. They play both offense and defense. The midfield (middle ground) is the link between the offense and the defense.
Keep your eye on the forwards. They finish the attack and try to score. They must be willing to come back and aid in the midfield or defense to start an attack. Often, forwards are required to help defend corner kicks and free kicks.