The topping on a salad often adds the crunch, and you can certainly satisfy that requirement with prepared croutons. They come in lots of flavors and a number of sizes. You can also go the creative route without expending any more time. Sprinkle a few seeds on your salad. Sesame seeds, pumpkin seeds and sunflower seeds are all full of vitamins and minerals, and they add great crunch. This goes for nuts like almonds, pistachios, cashews and walnuts, too. One quick sprinkle and you'll add appeal to your salad as well as a nice little cache of vitamins and minerals. To keep seeds and nuts fresh tasting longer, refrigerate them.