You constantly drop the ball
fizkes/Shutterstock Poor sleep quality has direct effect on concentration—everyone has experienced that. (Here’s an easy trick to improve your concentration in 24 hours.) But a restless night also hurts memory. “When sleep suffers, so does cognitive performance. In fact, it may be the reason why you spaced on that dental appointment, put the milk away in the pantry and the cereal in the refrigerator, or forgot to call that client back,” says insomnia specialist and nurse practitioner Ellen Wermter.