While facing one or two other players, do an over the head beat. Before you catch the ball, pass it to a nearby teammate. In the middle of the pass, hold X to usually confuse the goalie and score. If you do not have any nearby teammates, just hold X when the ball is in the air to shoot.
Go to the "Game Modes" screen, then choose your team. Go to "Head Start" and set it as desired. For example, if you want to win by five goals then choose "Head Start 4+" so that you will only have to score one goal to win.
To unlock all the pitches, Hold L + y and press Left, Up, Up, Right, Down, Down, Right, Down at the main menu.