It is difficult for anyone in the society to avoid difficulties in all aspects of our life, and as the world becomes busier and busier, we often face a lot of pressure. In order to live a happy life, I believe keeping a good mood is the key. First of all, keeping a good mood will make you energetic, which can ensure that you focus on your own things, such as work and exercise. Only when we live regularly can we make fewer mistakes. Second, a good mood will help you tide over the difficulties. If you fall into a bad situation but establish a good mood, you will actively look forward to a better future and start to act instead of just feeling depressed. Therefore, it can relieve your anxiety and help you to stick to it. In addition, a good mood is good for health. Health is very important to our life. Because it keeps us away from diseases, so we can do our best to fight against difficulties. To sum up, a good mood contributes to a happy life, so we should learn to keep a good mood at all times.