Tired of tossing greens week after week? This ice-cube hack will help you out. Pick up some BPA-free ice cube trays or baby food trays, and buy a variety of greens. You can puree them separately in a food processor or blender or puree them together, adding a little water to yield a smooth consistency. Pour the puree into the little wells, attach the lids, and freeze them. Once the cubes are frozen, you can leave them in the trays or pop them out into gallon-sized freezer bags. When you're ready to make your smoothie, just grab a few, and throw them in your blender — it's a great time saver.
You can also use ice trays to store herbs and sauces, too.