Using any club, set up to the ball.  Then turn your hips, chest and arms slightly so that you are now setting up to an imaginary ball opposite your right foot.  Start your swing from here and finish normally.  Because you have started further behind the ball your body must rotate further forward to get back to the ball.  Be aware of how your body feels in its finish position, have you moved more into your left side? Hit 5-7 shots this way and then test it by hitting a shot from a standard set up and try and recreate the finish as if you were doing the drill.