According to a local vendor of inflatables, the most common mistake made when towing is improper use of the towing bridle.
Many boaters knot the tow bridle into a loop at the center, and attach a towing line there.
This is wrong. The towing line should not be fixed to the bridle, but instead should end in a small bowline loop, through which the bridle passes. This allows the tow line to slew back and forth in the bridle, and provides for tension in both sides of the bridle. Not rigging the tow line this way is the most common cause of failure of the pad eyes on the dingy to which the tow bridle is attached. It is inevitable that during towing, the dingy will rock a little from side to side, shifting the strain on the bridle from one side to the other.