First, you need to detoxify your mind,liberate from all evil thoughts and intentions.Make sure that you do not even think about doing any harm to others.One should know how not to give sorrow to others.At the same time one should also know how not to let others give sorrows to you.Some people tend to specialise in causing sorrows to others.If you are not alert to identify such people,you will pick up the sorrows and carrying them in your mind.
One should use your mental and physical strength to fight against the negative thoughts and cause harm to yourself.Use your imagination to think of alternatives to such negative thoughts. You can practice to control the physical effects of negative thoughts.
Second one emotion you need to overcome is fear.Some people get afraid,even though they are not clear about what they are afraid of.Some people are afraid of creations of their own imagination.For eg:-if one travel with flight or train imagine in-between may happen any accident and not reach the destination. Like always parents have the fear that daughter or son can't get married in time.
Third one Ego-that also ought to be transformed.Once ego start forming in your mind the creator God out from your mind.An egoist is incapable of thinking about anything or anybody except in terms of his own self.This exclusive concern with "I","Me", "My"and "Mine" should go.
Finally avoid all poisonous and negative thought people from all your dealings.Get confidence and strength to overcome all fears in your day today life.Purifying the mind,get rid of all negative thoughts and emotions and evil intentions and create positive thought favourable for the smooth functioning of your life.