Most of us have exhibited the symptoms of lack of attention at one time or another. It's actually harder to stay awake than we might think. Perhaps we are easily distracted by trivial pursuits, attracted to any media message, ready to jump into any conversation, or susceptible to periods of endless surfing through the information and choices available to us.
Eventually, without awareness, we end up living in a daze of stimulation without any grasp of its significance. We are operating on automatic pilot. Because nothing really registers on our consciousness, we feel drained of energy.
Sometimes, however, not paying attention has just the opposite effect: everything registers, and we find we don't know what to do with it all. We are so bombarded with stimuli that we can't focus on anything. We feel scattered. We are, to put it simply, stressed.
For both lack of energy and stress, attention is a good corrective prescription.