Decide what you can spend while at work during the week and put that amount into an envelope, said Dayana Yochim, a personal finance expert with the Motley Fool, the financial advice Web site. 理财咨询网站MotleyFool的个人理财专家DayanaYochim建议,可以计划好一周的正常开销,把这笔钱装进一个信封里。