If you plan to drink the smoothie immediately: combine all ingredients in a blender and blend on high speed til totally smooth.

If you plan to drink the smoothie a little more leisurely: combine blueberries, chia seeds, banana, and 1/2 cup milk and blend on high speed til smooth. Wait about 5 minutes, giving the chia seeds plenty of time to gel up the mixture. Add the remaining 1/2 cup milk and blend again until smooth.