To achieve greater happiness you must learn how to act and react to people and situations. The trick is to learn self-interest without selfishness.
One avenue to healthy self-interest is first to trust in yourself. It’s wise to assume that you are a person with good intent. To assume anything less will achieve nothing of worth.
Accept yourself for who you are, with all your strengths and weaknesses. When inclined, attempt to change what you don’t like about yourself and enhance those qualities that you do like. Remember that...