I started making smoothies on my Magic Bullet and eventually graduated to my NutriBullet.
I'll buy a huge bag of blueberries, mixed frozen fruit (peaches, pineapple, strawberries, and mango), and unsweetened cranberries from Sam's Club, and I'll chop up veggies (typically cucumbers and baby carrots). I measure out a cup of them all mixed and store each portion in its own Ziploc bag in the freezer, that way I can just quickly grab a bag when it's time for breakfast. Lately I've also added a pitted date to each bag, and sometimes I add spinach too.
When it's time to blend them, I add a teaspoon of chia seeds, a scoop of vanilla protein powder, stevia, some cinnamon, a couple of ice cubes, and various diet juices (that are very low in sugar) or prune juice, if needed.
Sometimes I also add a little plain greek yogurt. Once it's blended smooth I add a small handful of nuts to stir in to get more omega 3's; while the smoothie is thick and creamy, I like to have something to chew on when I eat it.
I also try different fruit (like pumpkin!) but this has been my go-to for a while. It has been an enormous help with losing the last 50 pounds, and helped ensure I was getting some good nutrition while pregnant.