Will Power, Rediscovering the Greatest Human Strength

The short term memory part of your mind functions much like ram random axas memory on a computer. You can think only about two or three things at once, but the incomplete items are still being stored in the short term memory space. Most people walk around with their ram bursting at the seams. They are constantly distracted, their focus disturbed and performance diminished by their own internal mental overload. This produces a pervasive stress factor whose source can't be pin pointed.