Here are 3 healthy tips to help you save:

Pay with cash

A Cornell University study found that people who swiped a debit or credit card at the checkout line instead of peeling off bills consistently bought more ice cream, doughnuts, and snack chips. The reason: You’re more aware of your spending when you count out cash, and less likely to make impulse purchases of junk food.

Buy the cheap produce

“By adding even the most affordable items in the produce department to your cart, you’ll increase your nutrient intake,” Monsivais says. Check out the dried fruits and plain frozen vegetables (not the microwave meals)—they’re often cheaper per pound than fresh varieties, they contain nearly the same nutritional value, and they take much longer to spoil so you’ll have less waste.

Avoid supermarkets surrounding discount megastores

Go in the warehouse stores themselves, but avoid the grocers nearby. A recent National Bureau of Economic Research study found that the presence of a Costco caused other supermarkets in the vicinity to raise their prices, particularly in small cities. The researchers believe that Costco absorbs the most price-conscious shoppers, leaving other chains free to gouge their remaining customers.