When the air turns crisp and the evenings become dark earlier, a comforting and flavorful soup or slow-simmering stew on the stovetop is a welcome way to bring calm to a busy day's end. Served alongside a bright salad and a crusty loaf of Italian bread, the warmth and aromas of a good soup throughout the home can heal and soothe, like food for the soul. Today, I'm sharing four cooking techniques that will add tons of flavor to your stocks, sauces and soups.