Cover ground fast with the ball under control. Push the ball into the space ahead with the front of the foot, accelerate onto it, keep your head up, and settle it to finish at the end of the run.
Set a channel with a couple of gates and a goal at the end. The player pushes the ball into space and drives through the gates at speed, then steadies and finishes. Big touches into space when the path is clear, shorter touches to steady before the strike. Keep the head up. Time the run and finish, and rotate.
Running with the ball and dribbling are different skills, and conflating them produces players who are bad at both. Dribbling keeps the ball within a stride so it can be protected and manipulated in tight space. Running with the ball pushes it five or ten yards into space and sprints onto it, because the objective is covering ground rather than keeping it away from anybody.
The touch that separates them is where and how the ball is struck. A dribbling touch uses the inside and outside of the foot to nudge. A travelling touch uses the laces or the front of the foot to push the ball forward with real intent, and it should be firm enough that the player has to accelerate to catch it. A player taking small touches while trying to run fast is fighting the ball the whole way.
How far to push it is a judgement about space and pressure. Alone on a counter with forty yards ahead, the touch can be enormous. With a defender recovering across, it shrinks. Teaching the extremes and letting players find the middle is more useful than prescribing a distance.
The head is the other half. A travelling touch buys three or four strides in which the player does not need to look at the ball at all, and those strides are exactly when he should be reading what is ahead. Players who look down between every touch waste the one advantage this technique creates.
Settling it at the end is worth coaching too, since a run that ends with the ball out of control has achieved nothing.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.