Shopping without a list is shopping with your impulses. Grocery stores are engineered to trigger unplanned purchases — placement, displays, checkout lanes all aim to get items into your cart. A list transfers decisions from the store (high temptation) to home (clearer thinking). The single rule: nothing enters the cart that isn’t on the list.
This companion covers the store’s design, the list as defense, auditing your shopping, and strengthening discipline. (3 min read)