aldi's for snacks like popcorn, milk, bread, bananas, frozen pizzas. It is 2 blocks away from son's preschool so I can pretty much plan dinner from there in a pinch
Meijers for meat and frozen veggies. Usually diet coke/pepsi at Meijers also because they alternate sales weeks.
their is a farmer's market place nearby that has the best fresh vegetables.
toilet paper, shampoo, stuff like that I keep an eye on who is having a sale when i run low and then stock up.
Wal Mart, dollar store, family dollar etc for cleaning supplies etc.