It's easy to forget things at the supermarket as it is, but it often seems that less-frequently purchased items such as flour are even harder to remember. Martha Stewart suggests keeping your shopping list in your pantry as opposed on your refrigerator to avoid forgetting less common items.
While her suggestion incorporates chalkboard paint into the equation, you can use whatever method you prefer to get the same results. Since pantries are often layered with a lot of different types of foods, it might help you avoid making multiple trips. If you're lucky enough to have a separate pantry, it's definitely a strategy to consider.
Pantry Reminder [Martha Stewart]