The Price Book is one of the most powerful tools you can create for your family budget. A Price Book is simply a notebook you create with the prices listed for an item you always buy. The reason you want a Price Book is simple, to only buy items at the lowest price possible. Here is an example of a Price Book, when I first started I used a spiral notebook, I have graduated into an excel spreadsheet. Item:

 Obviously I am going to wait for the sale at King Soopers.