Best practices for grocery shopping to support a healthy diet include planning ahead and creating a detailed shopping list. Start by preparing meals for the week, identifying the ingredients needed, and opting for whole foods like fruits, vegetables, and lean proteins. Shopping on a full stomach can help avoid impulse buys of unhealthy snacks. It's also wise to shop the perimeter of the store, which often features fresh produce and less processed foods. Additionally, reading labels for added sugars, sodium, and unhealthy fats can further guide healthy choices, making grocery trips productive.