Try to watch your thoughts during the day， as if they are not yours， without being sucked into them. Become conscious of the fact that you are watching your thoughts. Then this awareness of watching will increase.
You will have to remind yourself incessantly to practice watching your thoughts， as your mind will probably make you forget. Do not give up and you will succeed. If you practice as often as you can， you will be on the way to success. It may take some time， but the effort is more than worthwhile.
You can also increase your peace of mind by developing the power of concentration， by meditation， by physical exercise and by correct breathing.
The important thing is， practice， practice， and practice. Remember！
You are not your mind！
You are not your thoughts！
You are not your ideas！
You are not your beliefs！
They may be yours， but they are not you.
They are instruments you use， do not let them control you.
What remains after they are rejected is You， the real I.
When thoughts cease， you still exist. There is no vacuum， When the emptiness of no thoughts is reached， you begin to feel your existence， your being. This emptiness is filled with something great， wonderful， powerful and sweet. You start living in Peace. You sail on the water of the calm mind. This is Pure Existence.
When you realize this state you are free from thoughts.
Then you are really free.
In this state nothing can influence you. You stop acting instinctively on the prompt of each passing thought. You become a completely conscious being， alive， strong， beyond everything.
You stay in this world. Your life continues， but you are beyond.
True peace of mind is the gate to Enlightenment.
Think of serenity of mind as a feasible possibility. Calm your mind by autosuggestions， meditation and concentration， and start enjoying peace of mind.