I Liked This One Better:

Yesterday's smoothie was yummy, but today's was better:

1/2 cup 1% milk (55 cal)
1 med. banana (70 cal)
chunks of watermelon (not sure how many calories, but pretty low I think).

The combination of the watermelon and banana was delicious, and it blended better than the avocado did (I'm assuming because the watermelon is higher in water content). Yum :-)