Then, NEVER go into debt again. Pay with cash. If you do not have the funds on hand, do not buy anything.
Cash-based transactions is definitely one way to fight credit-based spending, the bane of the American way of life. But not everyone got into debt through unnecessary spending. I know one or two people who got hit with big medical bills. There are also plenty of people who suffered job loss, took out college loans, etc. Sometimes you don't have a whole lot of control.