We were talking about weight loss in The Thrifty Mama's chat room earlier, and the topic of green smoothies came up. I love love love my green smoothies! Its super easy to make, and I swear you don't taste the spinach!
Here's what I do:
Pack a magic bullet cup with washed spinach leaves and add a Tbsp of water (or juice). Blend. Then add in as much frozen fruit as you can fit, and top off with yogurt or milk or more juice. I personally add milled flax seeds, too, but that's totally not necessary.