Purchasing, Inventory and Waste
How to buy for the next cooking day, track what you hold, and cut waste.
Buy for the next cooking day, not for the month.
A home fridge is small. The same-day rule means nothing cooked survives to tomorrow. So the whole inventory game is: buy what you will use, store it right, throw away as little as possible.
Buy for one cooking day at a time
For a two-day-a-week kitchen, shop Thursday for Friday and Saturday. Meat and produce for the week; rice, oil, sauces, and dry goods monthly. Frozen proteins can bridge the gap if your freezer allows.
Do not buy a case of anything until you have sold it for a month.
The shopping list
Work backwards from orders:
Dish
Orders
Per meal
Need
Have
Buy
Braised pork rice
20
5 oz pork
6.25 lb
2 lb
4.5 lb
Beef noodle soup
15
6 oz shank
5.6 lb
0
6 lb
Dumplings (12)
10 boxes
120 wrappers
120
50
2 packs
One sheet, every cooking day. It takes five minutes and stops both over-buying and running out.
Where to buy
Any licensed store or supplier: supermarkets, 99 Ranch, Costco, restaurant supply (Restaurant Depot needs a business license), wholesale produce. Not from a friend’s backyard, not from an unlicensed seller. The inspector can ask where your meat came from; keep the receipt.
Bringing it home
- Cold and frozen last in the cart, first into the fridge. Under 30 minutes in the car, or use a cooler.
- Check dates and packaging at the store, not at home.
Storing it
- Raw meat, poultry, fish: bottom shelf, in a container or on a tray.
- Ready-to-eat above raw. Cooked components above everything.
- Label with the date. Oldest in front, used first.
- Dry goods in sealed containers, 6 inches off the floor.
- Do not pack the fridge full. Air needs to move or the back freezes and the front warms.
- A cheap fridge thermometer on the middle shelf. Read it every cooking morning.
Waste log
A sheet on the fridge:
Date
What
How much
Why
Change
9/13
Bok choy
1 bunch
Bought too much
Buy 3 not 4
9/13
Cooked rice
6 cups
Fewer orders than planned
Cook rice in two batches
9/20
Soy milk
8 cups
Only 12 sold
Make 16, not 24
After a month you will see the pattern. Usually two or three items cause most of the waste. Fix those.
Waste is information, and money
Ten percent waste on $300 of groceries a week is $1,500 a year. The log is worth the two minutes.
Official sources
The rules and inspection information on this page come from San Diego County. My Home Kitchens explains them in plain English; the County is the authority.
- San Diego County DEHQ — MEHKO SOP form: approved sources, storage, same-day; Self-Inspection Checklist (storage rules) (rev. 8/14/2026)
- Purchasing and waste guidance is My Home Kitchens practical guidance.
Last verified: September 11, 2026
My Home Kitchens provides general educational information, not legal, medical, allergy, or tax advice.