Next time you head to the grocery store, stop at the ATM first — we buy less, and even less indulgent things, when we pay in cash. According to a recent study:
"When consumers encounter vice products — such as cookies, cakes, and pies — the emotive imagery and associated desire trigger impulsive purchase decisions. Pain of payment can curb the impulsive responses and thus reduce the purchase of such vice products."
Keep your shopping healthy and stick to greenbacks for payment and you'll likely buy more leafy greens.