shopping lists

When I have a shopping list of things I need I can cut my time by at least half when I'm in the store.  It keeps me focused and I avoid buying extra random snacks.  One time my sister told me she dropped her shopping list in Target but didn't know when.  She walked around Target scanning the floor for the shopping list and even asked one of the workers if it was turned in.  No such luck!  I can imagine I would feel like there's something I forgot to buy or left behind and then I remember it once I got home!