I used to throw away a third of what I bought. Herbs went slimy in the drawer, bread went stale, berries molded before I got through half the carton. It felt like I was paying the grocery store to compost for me. Then I learned the actual rules for how food spoils, and my waste dropped to almost nothing.

The Rules That Changed Everything

• Herbs last in a jar of water in the fridge, like flowers. Cut the stems, stand them in an inch of water, cover loosely with a bag. Two weeks instead of four days.
• Berries get a vinegar bath. Soak them in one part vinegar to three parts water, rinse, and dry. It kills the mold spores that turn a carton into science experiments.
• Bread lives in the freezer. Toast it straight from frozen and it tastes fresh. A loaf becomes six mini loaves, each sliced as you need it.
• Store onions and potatoes apart. Onions give off gas that makes potatoes sprout faster. It sounds like superstition, but it is real.

Shop Smarter, Waste Less

1. Plan meals before you shop. Not a rigid menu, just a rough idea of what you will actually cook this week.
2. Buy the odd-shaped produce. It is cheaper and just as good.
3. Shop with a list and do not browse. Browsing is where impulse buys and waste are born.
4. Check the fridge before you shop. You are probably about to buy a second jar of something you already own.

The Leftover Rule

Cook once, eat twice. Double the batch and freeze half. A pot of chili, a tray of lasagna, a batch of soup, all freeze beautifully. On busy nights, defrosting dinner beats ordering in and spending three times as much.

What It Added Up To

I tracked my waste for a month after I started this. I went from tossing a bag of spoiled food every week to throwing out almost nothing. My grocery bill dropped by about twenty percent, and I stopped feeling guilty every time I opened the crisper drawer. The herbs-in-water trick alone paid for this article.