Brain

Scientist didn't find any heart which can feel its the brain which make it feel, there is no mind which is calm its the brain which can calm. And now the research shows brain is ever changeable scientist call it Brain Plasticity. So that means we can train our brain for anything as it keeps on changing over the time.
There is a part in our brain called amygdala which in high stress situation creates a fight or fly feeling in us. Say suddenly you find a Tiger in front of you then you will feel horrified, this feeling is called fight or fly response. Now it generally passed away as soon as the situation is over. But now a days as we remain in high stress whole day long due to many reasons like job, finance, relationship etc. And slowly we become habbituated to this feeling and we start feeling those as a natural feeling. So now a days people are facing mental problem like frequent panic attack, short breathlessness, tensed muscle and so on. Infect research shows high stress causes speedy aging and high mortality chances.

Some of the steps I must suggest to keep our brain healthy are:

• Use guided hypnosis for relaxation, you will find lots of free Mp3 for guided hypnosis. Its really works well
• Try Mindful meditation. 
• When you feel too much tensed then just concentrate on breathing
• Mediate for long time it increase serotonin production in brain
• Keep yourself away from too much attachment to a person or thing
• Always ask the question to yourself 'what if?'

 If you try all this and still you feel anxious for stress then go to doctor. Its very important to consult a doctor during early signals before it becomes cronic.