How to buy nothing for one week
How I did it: Bought groceries and gas ahead of time, picked a week when all bills were already paid, and cooked at home. It was simpler for me than for my husband, but a good lesson in money consciousness for both of us. It especially brought home to him how habitual some of his spending habits are.
Lessons & tips: Get things ahead of time so that you don't have any excuse to go buy something.