well the one I recommend for beginners is: (and this is my own personal favourite)
A nice big handful of baby organic spinach (greens are healthier for you BEFORE they flower)
about 2-3" of filtered water.
Blend.
Now add 3 organic bananas.
Blend.
Next add some frozen blueberries. 1 cup is a good amount.
Blend.
Drink!!!
Super healthy, super yummy and a great way to start your day!