Carefully pour the yogurt into ice cube trays and put the trays in your freezer so that the yogurt can flash freeze. This method will prevent the cubes from sticking together. 

After the yogurt has turned into solid cubes, remove the cubes from the tray, and then put them into heavy-duty freezer bags. 

Make sure to label the bags with the current date.

When you want to prepare your smoothie, simply remove some cubes from the bag and blend them with the fruits of your choice in your blender.