1) Hold the ball side on, meaing with your body between the defender and the ball, so you can have a look around. 2) Carry the ball with the furthest foot away, so the defender can't take it. 3) Keep the ball moving, so it's hard for the defender to get a read on the ball and steal it.
Here's some highlights of Michael Essien playing for Chelsea. Not only is he strong on the ball and good at shielding the ball, but he can score goals as well.