Instead of dumping that salty, vinegary liquid left behind after you eat all the olives and pickles in a jar, save it for brining chicken, pork, or even tofu for a flavorful weeknight supper. Marinating a few small pieces of meat in olive juice only takes a few hours, and it's also a great way to use up everything in your fridge, which will cut down on food waste and save you a little money.