I believe one of the easiest way for a person to live a happy life is that they should always ensure that they should surround themselves with people who genuinely love and care for them, people who believes in them and have great connections with them , doing this can give a person genuine happiness because spending time with people who love you and believes in you is a great motivation and it can lead to a very happy life for you.
Another thing which can make an individual to be able to get happiness in their life is that they should continue to do only what they care about and have passion for , they should engage in the positive things which always makes them feel satisfied and excited to do , doing what we love can create happiness for us and therefore it leads to a happy life for us.
We can only stay happy when we engage in activities which makes us really happy as long as those activities are positive and not negative...