警告和威胁时常没有效果。比如吃多了告诉自己会长胖，比如要身边的人戒烟因为吸烟有害健康，比如让孩子勤洗手。用警告和威胁的方式时常达不到效果。那应该采取哪些措施呢？
1. social incentive：社会激励。把个人放入群体中。通过告知别人的进步而促进自己的进步。我们关心其他人在干什么，看到别人做我们也想做，而且我们希望做的更好！We are social people. We care about what others are doing. We want to do the same thing and we want to do it better. So highlighting what others are doing is really an incentive.
2. Immediate rewards: 即时奖励。我们更关心一件事情能否立刻得到回报，我们才不关心这件事情是否在未来得到回报。We value the rewards we can get now more than the rewards we can get in future.
3. Progress monitoring: 进度监督。想要让他人信服，需要强调进步，而不是退步。If you are trying to get people’s attention, you might want to highlight the progress, not the decline.
