Slow Down and Savor
Unless you are in a life-or-death situation that requires speed, taking a slow and methodical approach can add pleasure and efficiency to work. Rushing matters often squanders time that would have been saved if a slower pace were employed. Rushing about can also, of course, jack up the stress level.
I suggest an experiment. Try the slower approach in which tasks related to high priorities are savored as they are completed. See how much was accomplished in comparison to your faster days. In my experience, roughly the same amount or even more is done in the slower paced periods.
Focusing on and enjoying meaningful actions instead of juggling an assortment of activities is as productive as it is calming.