What’s a quick trick to help you spend less money?

Via Journal of Consumer Research:

To examine consumers‟ feelings of constraint, Spiller assigned study participants to a monthly budget group or a weekly budget group and gave them the opportunity to make 20 purchases. Those in the monthly group were given a sum of money at the beginning that they could spend throughout, whereas those in the weekly group were given a smaller amount four times throughout the study. “Compared to those in the monthly budget group, those in the weekly budget group looked at future purchase possibilities more before deciding whether or not to buy the current purchase,” writes Spiller.