After a hard day at the office, where you were focused intently on a challenging project, you may consider a choice on the way home: impulsively splurge on a fancy dinner as a reward for that cerebral slog or save that bit of cash as planned—perhaps putting it toward a relaxing vacation next

Source: http://arstechnica.com/science/2016/06/heres-why-you-might-not-want-to-make-money-decisions-after-a-tough-work-day/