Become aware of your vulnerabilities.

Question your repeated behaviors.
In case of buying a new cell phone, could you take a step back from the cutting edge, reduce your outlay, and use some of the money for something else?

Pay attention to the first decision you make.
Pay particular attention to the first decision of many decisions (about clothing, food, etc.) you make. When we face such a decision, it might seem like it won’t have large consequences; but the power of the first decision can significantly affect us for years. So the first decision is crucial, and it deserves an appropriate amount of attention.