I am an Ayurveda instructor and I can tell you that this problem you describe is a thing that plagues Vata types. They are constantly changing their minds and activities and thrive on movement from one thing to another, then feel anxiety about to-do lists. The goal is to find some grounding with a more regular schedule and prevent the anxiety. Perhaps their productivity seems better when they're free, but if they let it go too far their anxiety will be through the roof. Just my observation.