Sorry to sound cynical, but this just seems like an over-inflated sense of saving that doesn't reflect reality. Sure, I could add in no Starbucks for the week and feel good about it, but then I don't usually have Starbucks anyway. Now, instead of doing something proactive and saving money, I've tricked my mind into believing I am saving money while I am not, thereby hindering any progress towards real goals that need actual savings, not 'mental accounting gimmicks'.