The shopping list starts at home.
The third jar of mustard
Somewhere in almost every household there is a duplicate purchase hiding behind something else. A jar of mustard bought because the other one was pushed to the back of the refrigerator door. A bag of rice bought because the open bag fell behind a pot on the shelf. A block of cheese bought Tuesday because nobody looked before leaving for the store. These are not signs of carelessness. They are signs that the shopping trip started in the wrong place.
The fix takes five minutes. Before writing a list, open the refrigerator and look. Open the freezer and look. Walk to the pantry and look. Note what is already there, what needs to be used soon, and what is genuinely running low. The shopping list you write after that walk is shorter, more accurate, and less likely to produce food that sits until it spoils because nobody realized it was a duplicate.
A list with quantities, not just names
"Milk" on a list is a reminder. "Milk, one gallon" is a purchasing instruction. The difference matters when someone else does the shopping, and it matters when you are standing in the aisle deciding between the quart and the half-gallon. A list that specifies how much prevents both overbuying and the trip back for the thing you did not get enough of.
The same principle applies to produce, meat, and anything perishable. "Chicken" is vague. "Two pounds of chicken thighs, enough for Monday stir-fry and Wednesday leftovers" connects the purchase to the meal plan from Unit 3 and puts a natural ceiling on the quantity. If the household is eating out Thursday, buying enough chicken for four dinners is not a deal. It is food waiting to be thrown away.
Cheap food thrown away is expensive food. The price you paid is not the price you got if half of it went in the trash.
Walk the kitchen before the store
The action step is the walk. Open each zone of your food storage, note what is there, flag what should be used soon, and identify what genuinely needs buying. This becomes the foundation for every module that follows, because you cannot rotate what you have not inventoried, and you cannot maintain a pantry you have not looked at.
The reading for this module
This is the core reading for the module. Take it with your earlier work beside you.
Walk the kitchen before the store.
Before your next shopping trip, walk through the refrigerator, freezer, and pantry. Write down what you already have, what should be used soon, and what genuinely needs buying. Note quantities, not just names.