I go through phases of loving and then being sick of breakfast smoothies. I've been loving them ever since I discovered a smoothie recipe consisting of:
plain or vanilla yogurt (I like Light n' Fit)
I don't remember the prescribed amounts...use your own judgment. :) I usually add two or three ice cubes to increase the thickness. The other day, I substituted blackberries and almond butter because that was what I had on hand. The risk paid off - it was DELICIOUS. I would have had another one for breakfast today if I hadn't accidentally shut off my alarm and overslept. Instead I grabbed a Fruit n' Yogurt Parfait on the way to work.