The main key to peace of mind is to always have positive thoughts in mind and inside.
Don't think badly of people who disparage you or insult you,Think positively, this might not solve ALL of your problems. But this activity WILL expel the nature of haters in you and then you can do something more useful.
Do not hold grudges or anger in your heart.
The recipe for calmness is never to save hatred. Revenge is like poison. He can master your life. Before you realize it, revenge can turn you into an evil person. We recommend that if you feel your day is really hard, then believe that in every difficulty there is always an ease.
Clean the heart, holy soul, eliminate jealousy and forget all your bad past, then get rid of these traits so that you get calm in the soul, keep thinking positive and find calm in the soul, if you still have not found peace of mind, then get closer to the creator (god) and thankful for what you have now, property, family, children, wife and siblings, friends, that is a valuable treasure in life.