They develop a positive mental attitude and energize others.
It is always easier to be a cynic and a pessimist. However, it is harder to set yourself up for success and get a good reputation.
They always speak using a respectful and friendly tone.
They listen carefully to their interlocutors.
Communication in an arrogant instructive manner is a great way to satisfy your own ego, but it is disastrous path for those who want to please their interlocutors and to establish friendly relations.
They know how to maintain composure in any situation.
Too emotional reaction, both positive and negative, can create a bad impression of the person. Remember that silence can often far more effective to convey information to the interlocutor, rather than words filled with negative emotions.
They are calm.
The relevance of the words and deeds is one of the most important qualities that people love and respect of others.