Buying ahead is a great way to save money. All stores have twelve week sales cycles, which means that everything that you buy at a store goes on its lowest price once every three months. So instead of going to the store and buying what you are almost out of or what you need, start thinking ahead. When an item goes on its lowest price, buy enough for the next three months so you start paying pennies on the dollar for what you normally would buy. Then you build up this stockpile of things that you've gotten at rock-bottom prices and it significantly reduces your grocery bill.