I grocery shop. I get the watermelon thing. Here are two odd things I do. I buy undented canned goods. When a can has a label on it, I will rotate it in my hands and rub them all over the can. If there's a hidden dent, it goes back on the shelf. To an onlooker, it probably appears as if I'm feeling up the cans, which I am, but if it's going in my grocery cart, it has better be in good shape. I check dates on everything. Sometimes the stock on the shelves will be properly rotated, so the newer products are toward the back. I get the newer products.