I got a Vitamix blender for Christmas.  This baby is so wonderful.  I've made green smoothies every day since I opened it up.  Then, last night we made apple juice.  We blended up the apples in the Vitamix and then strained the juice out in a muslin bag I made just for that purpose.  The apple juice is for healing my gallbladder.  You probably don't want all the details.
Anyway, the Vitamix is awesome!  It is the best Christmas gift I think I have ever received.  Mostly because it is something I feel will improve not only my health, but the health of the rest of my family.  Okay, so maybe IT won't improve our health, but what I make in it can.  I have been sticking to at least 1 quart of green smoothie every day.  I give each of the kids a glass of it as well.  They love it!
As I'm sure you probably already know, a green smoothie is fruits blended with some leafy greens.  My favorite is kale.  I didn't so much like it with chard.  Spinach is okay as well, as are most types of lettuce.  Mostly I use kale, though.  You can't even tell it is in there.  Some days my smoothie is green and some days it is more purple.  It all depends on what I put in it.  Some fruits I have used are plums, pears, oranges, lemons, limes, pineapple (love it!), mango, berries of all sorts, and always, always banana.  I've seen it recommended that children and people new to green smoothies add a sweetener such as honey, but I don't think it needs anything more.  
Green smoothies are a great way to add more fruits and green leafies to your diet.  I am aiming for at least 50% of my diet to be raw foods.  Eventually I'd like to be between 60-80%.  The green smoothies are a great start!  I'm not sure Jeff is all that excited about that much raw food, but the smoothies are a start.  I've learned you just take things one step at a time!