Question

what Is necessary for being a good and calm person..

Answer 1

meditation is must quality in a calm person

btw a good person has 2 meaning...one who do not react to anything happening against him
and another who know when to react and how to react

meditation occurs in a healthy mind..and healthy mind exist in healthy body so EXERCISE is also required

Answer 2

Being cool and calm are always important but not every man has this qualities, that doesn't mean he is a good guy. But I don't much about attitudes but this is all I have to say. Hope it helps.