Barcelona's Andres Iniesta demonstrates his favorite move: La Croqueta. This is where you pass the ball to your other foot and push the ball past the defender.
Really, it's just shifting the ball to your other foot and touching it past the defender as they dive in to try to win the ball. The key though, as with all dribbling moves, is to dribble off faster after you do the move - a change of pace to beat the defender.
Here are some more examples of Iniesta using the Croqueta move in a number of different games for Barcelona.