Make the save, then make it again. Parry the first shot to a safe area, get back to a set position fast, and react to the rebound with a second save.
A keeper faces a shot, parries it out, and a second striker follows in to hit the rebound, which the keeper must recover to save. Emphasise parrying the first shot wide and to safety, exploding back to the feet in a set position, and staying big for the second save. Feed the shots quickly to build the recovery habit. Rotate the shooters.
Where the first save goes decides whether there is a second shot at all, which makes the parry a tactical decision rather than a reflex. Pushed wide of the post or out towards the touchline, a save ends the attack. Pushed straight back out, it hands a striker an easier chance than the one just faced, against a keeper who is now on the floor.
So the first coaching point is directional parrying, and it needs deliberate practice because the instinct under pressure is simply to get a hand on it. Turning the wrist to steer the ball wide as contact is made is a small adjustment that changes the outcome of the whole sequence.
The recovery is the second half and it is mostly about refusing to stay down. A keeper who has made a good save naturally wants a moment to acknowledge it, and that moment is exactly when the rebound arrives. Getting off the floor should be trained as a reflex attached to the save itself, not as a separate decision made afterwards.
The most common technical fault on the second save is being caught mid-movement. A keeper scrambling back towards his line when the second shot comes is unbalanced, on one foot and diving from nothing. Better to set where you are, even off your line and slightly out of position, because a balanced keeper in the wrong place saves more than an unbalanced one in the right place.
This is an advanced exercise and it belongs with keepers whose base handling is already sound.
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.