Aristotle used to say: “We are what we repeatedly do. Excellence, then, is not an act, but a habit.”
Try this. For a week, put a small camera facing you during working time and turn it on for a few hours a day, or simply a mirror. Try to watch yourself, paying attention to the smallest habits and see what you do and how you behave during working time. It may help you spot bad habits to get rid of and pick up good ones to nurture.