the best way i've found to save money is to buy all my packaged foods (yogurt, soymilk, wine, condiments, dried fruit) at trader joes, veggies at the korean markets (half the price of ralphs), and meats on sale at the supermarket. i buy boneless skinless chicken if it's cheap, but otherwise, i debone it when i get home, and wrap it in saran wrap and freeze it.
i think we would spend twice as much at least on groceries if it weren't for trader joes. i love that place. two buck chuck forever!!