Don't criticize, condemn or complain. Criticism breeds Criticism Try to understand opposition. Give honest and sincere appreciation remember this does not mean flattery which is an empty and in sincere action stop thinking about yourself and begin to think about the other persons good points arouse in other person and eager want thinking that terms of other people's point of view become genuinely interested in other people  smile. A smile and open way to create a good first impression remember that a person's name two that person is the sweetest and most important sound in any language be a good listeners. Encourage others to talk about themselves to become interesting be interested in that person engage in the conversation by directing questions that the other person  would like to answer talking in terms of the other persons interest make the person feel important and do it sincerely make them feel appreciated for either there accomplishments or there interest only way to get the best of an argument is to avoid it don't fuel the fire by arguing it only leads to puffed up egos. Show respect for other persons opinion never say you are if you are wrong admit it quickly and emphatically begin in a friendly way. Don't  immediately jump into a  conversation about your objects and goals get the other person saying yes immediately  avoid statements that would cause the opposition to say no start off with simple statements that are undeniably true that the other person do a great deal of talking Let the other  person feel that the idea is his or hers Try honestly to see the things from other person's point of view by being open to their opinions allows for them to be open about yours Be sympathetic with other persons ideas and desires starting firm declarations leads to unwillingness or worse argument appeal to the Nobel  motives dramatize your ideas throw down a challenge it encourages the other person while creating a feeling of importance Be a leader begin with praise and honest appreciation. Guide them slowly into the conversation instead of immediately stating their faults call attention to People's mistakes indirectly talk about your mistakes before criticizing the other person ask questions instead of giving direct orders that let the person save face not only does it help to keep their Pride but also keeps create a respect for you and praise every improvement Be hearty in your approbation and lavish in your praise give the other person a fine reputation to live up to use encouragement make the fault seem easy to  correct make the person happy doing the thing you suggest. 

And lastly always be a good person don't stop being good because of other bad people who come into your life.