The physiology of the brain is closely related to how we think and feel. The limbic system in the brain, for example, is the center of all our emotions. Understanding how this part of the brain functions will greatly help in understanding the psychology of the human being. There are certain hormones that have an affect on our moods and behavior so it is important to gain knowledge of physiology and genetics in order to grasp the science behind emotional responses, memory etc.
He could create a schedule, block the extra things they do that isn't necessary, or even take a few breaks. When you take a break you relax your mind, and when you do that you stress less so you can be more productive.
