Peace of mind is a state of mental and
emotional calmness, with no worries, fears or
stress. In this state, the mind is quiet, and
you experience a sense of happiness and
freedom.
Such peaceful moments are not so rare. You
have experienced them in the past, at times
when you were engaged in some kind of an
absorbing or interesting activity. More info on http://readersupdate..com.ng/2015/11/how-to-get-peaceful-mind.html?m=1 you can follow readersupdate..co.ke for more topics on concentration

Thoughts claim our attention constantly, wasting our time and energy on unimportant and useless matters. They actually, rule our life. We have become so used to this condition that we regard it as natural.
While breathing, we do not need to pay attention to each inhalation and exhalation. We become conscious of the process of breathing, only when we have some difficulty with breathing, such as when our nose is clogged, due to a cold, or when we are in an unventilated room.
It is the same with thinking. We become conscious of the constant onslaught of our thoughts, and of our inability to calm them down, only when we need to concentrate, solve a problem or study. We are also acutely aware of them, when we have worries or fears.
Examine this familiar situation. You need to study something for your job or for an exam. You sit comfortably on the sofa with the book in your hands and start reading. After a while, you feel hungry and go to the kitchen to eat something.
You return to the book, but a few moments later you hear people talking outside. You listen to them for several moments and then bring your attention back to the book.
After a while, you feel restless and switch on the radio to listen to music. You continue reading a few moments, and then remember an incident that happened yesterday, and start thinking about it.
When you look at your watch, you are amazed to find out that one complete hour has passed, and you have hardly read anything.
This is what happens when one lacks concentration. Imagine what you could have accomplished, if you could control your attention and focus your mind!
A job that requires physical strength, such as carrying heavy loads, for example, strengthen the muscles. However, it is not the same as exercising daily in a gym. Reading and studying, exercise the mind, but to gain strong concentration, you need to practice exercises every day, just like training in a gym.