1. the link below talks about the details of reward system inside everyone’s brain from the smoking perspective (in Chinese):

https://zhuanlan.zhihu.com/p/20314727

2. the link of the video below talk about the detriments of bad habit from the fapping perspective. Nofap!

http://www.youtube.com/watch?v=-oM6wDxaXI0&index=5&list=WL

The same applies to drinking, online games, drugs and so on. Know more about the reward system and understand how to leverage the system to make good habits accompanying you all though the life and getting rid of bad habits as soon as possible.