The Tiny Grocery Price Book I Would Start With Today
I can remember the price of a dinner I regretted three years ago, but I routinely forget what I paid for olive oil last month. That makes the grocery aisle a poor place to decide whether a yellow sale tag is offering a bargain or a small discount on a high starting price.
A grocery price book fixes that problem with a short record of items you buy again and again. You write down the package size, price, unit price, store, and date. After a few trips, you know the ordinary price and can recognize a genuinely low one without trusting the sign above it.
Old price-book systems sometimes tried to record the whole supermarket. I would never keep that up. Ten household staples are enough to begin, and even five can improve a shopping list. The book should remember prices you care about, not turn grocery shopping into unpaid data entry.
Start with items that are purchased often, cost enough to matter, and can wait for a better price. Coffee, cereal, rice, cooking oil, cheese, frozen fruit, detergent, pet food, and a few proteins often make better entries than salt or a once-a-year spice. Use your receipts, not somebody else's universal list.