What financial discipline tips help you avoid impulse spending?

[Savannah24]

Impulse spending is my biggest financial weakness. I can stick to a budget for weeks, then one bad day or tempting sale and I'm back to square one. What financial discipline tips have helped you overcome impulse spending? I'm looking for practical strategies that work in the moment when temptation strikes. How do you build the mental muscle to say no to unnecessary purchases? What financial discipline tips have actually changed your spending habits longterm?