Use melon or a slightly over-ripe mango instead of the banana. Or add a pot of low-fat natural yogurt to make an extra-creamy smoothie.
Slice the banana into your blender or food processor and add the berries of your choice. Whizz until smooth. With the blades whirring, pour in juice or water to make the consistency you like. Toss a few extra fruits on top, drizzle with honey and serve.