What he said. Banging balls around is useless. Something that forces you to focus is the trick. Play the ghost and mark down your wins and losses. Do not let yourself lose a set to the ghost. You'll hit 'em as good as necessary to get that runout.
I think banging balls around is the FIRST thing you should do. This will get you loose.
But when you bang them, be sure and concentrate on fundamentals: rhythm, bridge, preshot rountine, consistent eye movement, keeping head still, set/pause/finish/freeze - etc. Personally, I believe in hitting a ton of cut shots. This will get your eyes used to seeing the ghost ball. Laying off for a while will cause you to hit the ball fat.
One more thing - if you jump right in to playing too serious, you will start off stiff and probably stay that way for a longer period of time vs. if you had gotten loose first.
Just MHO.