Have you ever observed a 30 day rule before finally purchasing an item? According to this rule if you postpone the purchase of an item (not an urgent one) for some time, say 30 days, it may kill your urge to buy it. Moreover as time passes you will get a clear picture and its importance in your life. In that way you may save some money by avoiding not so useful items. It also has another advantage like you may get the product at a more discounted rate after some time, especially in items like smartphones. Have you ever changed your mind and wait for sometime before finally buying a product?