just pray to allah and trust him......you will definety get a peaceful life.....
You have to be kind and help others and learn to forgive as much as possible! :D
Kidness is not always the right way to have peaceful life. Sometimes you face someone who misuse your kindness and it cause you get into trouble.
The best way to have peaceful life is to respect people as much as they respect you.
Treat them as like as they treat you.
Being patient is another solution but it depends on condition as well.
That rather depends on your decisons, God alone can give you real peace. Stable and loving relationships are the next essential. Life avoiding confrontation is also advisable.