This is another one of those "Why didn't I think of this?" moments. Prepackage smoothie ingredients into bags so that when you're ready for it, all you have to do is blend and enjoy. No measuring, no mess. This idea came from this Pinterest pin.
I froze a yogurt/milk mixture in my mini muffin tin then added a few of them them to small bags of frozen berries. Now I have about 12 packs, ready to be blended up and taken on the go. (Add in a splash of milk or water because right out of the freezer, the mix will probably be too thick to blend).
I love my little fruit and yogurt baggies!