booster at free of cost.........."good"

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do u know that a small word "good" from us becomes booster to others.just experience the feeling by telling u'er partner or room mate or colleauge or u'er watchman,they turn to u as a new person, which is the result of u'er "good".it may be good morning ,good night ...........good mays a vital roll.do u have the habit of saying good to good or not .share u'er experience of the similar if so...........