control your impulsive purchase

http://moneyland.time.com/2011/09/26/want-to-stop-spending-try-thinking-about-cash/

In this article, it teaches people several tactics to prevent themselves
from buying implusively. But in our daily life, impulsive purchase more or less is
happening every single day. Therefore, living in such a poor era it has become a very huge issue in our life. I am here wondering,

1. Do you buy something impulsively often? how often?
2. Do you think the way in this article does work? why? why not?
3. Do you have some skills can teach us not to buy impulsively?Give us some examples.
4. Is saving money one of the ways to earn money? Or you may have the other better
advices.