Change a bad habits within 21 days !! I've read an article relating to changing a personal habit. Most people are used to living on their way, they are more likely to stay in the comfortable zone.Having participated running myself, I lost some weight in the one-month period. In addition, many significant changes have been seen after it. I also feel more healthy and energetic than ever before. Furthermore, there are some methods that can be used to enhance the motivation of changes. In other words, people could use a variety of applications or social media to promote their positive factors. One feasible approach of this is that running personal page on the social networking, users might upload some achievements on a daily basis. As a result, they are more likely to be encouraged by positive comments and feedbacks. In conclusion, I believe that people could achieve goals as long as they keep in the same way. Also, people should consider having an optimistic personality in order to maximize the best effects.