To get the most out of corners, aim towards where the most people are (slightly to your left if you are taking it from the right side of the pitch and vice versa) then set it to full power by holding Circle. As soon as it comes in, keep tapping Circle and someone will header it in.

When the goal keeper throws the ball to a defender, quickly tackle the defender and hold L1 and press Circle. Almost always this will chip the keeper, as he cannot get back to the line in time. This makes for a good replay, and also works from half way if you can time it correctly.