Working on a computer or gripping a steering wheel can cause your wrist extensors and flexors to stiffen up and limit their extension in your golf swing
Stradeling a string on the ground will help you see immediately if you stay centered throughout your swing or if you are swaying back or forward through the shot which leads to a faulty impact position
Developing resistance on the through swing of your pitch shots is critical for control, this retraction drill will also keep your club accelerating, avoiding the biggest mistake in pitching which is a decelerating clubhead