I lived in Dallas for a long time, at my last house a Whole Foods, a "neighborhood" Walmart and a Trader Joes popped up pretty much equidistant (7 minute walk) from my house. It is quite pleasant, actually, to walk to the grocery store and get groceries for that night's dinner. Since then I've always lived within a 10 minute walk and generally get one to two (paper) sacks of groceries two or three times a week, sometimes more often. Temptation to snack is drastically reduced as we only have 2 days of food in the house.