When I was pregnant, I had one nearly every morning! I used frozen fruit, skim milk (but almond milk would be good too), flax seed, wheat germ, and honey or agave nectar. You could use yogurt (I am sure I did that too) that compliments the flavors (like strawberry yogurt with a raspberry banana smoothie), or just use plain or vanilla.
Here are some combinations that I like:
Strawberry & Banana
Raspberry & Banana
Blueberry & Banana
Peanut Butter & Banana (sometimes I added chocolate chips...yum!)
Strawberry & Blueberry
Pineapple & Peach
Peach & Mango
Peach, Mango, & Banana
Strawberry, Blueberry & Banana
Raspberry & Blueberry
Orange & Banana
Orange, Pineapple & Banana
Orange, Peach & Mango
Orange, Peach, Mango, & Pineapple
Try any combo you can think of that sounds good to you! To freeze a banana, peel them RIPE (sweeter that way) and freeze in a baggie. You can freeze whole, in half, or slice them. If you have freezer room, slice and put on wax paper on a cookie sheet and freeze, then put the pieces in a baggie. I used fresh oranges (or clementines), not frozen. When I did this, I would need less milk. (If using oranges, put them on bottom.) The frozen fruit takes place of any ice needed to make it cold or thick. Put however much fruit you need for the number of servings desired, then top with some milk. Add the honey once everything is emulsified and the blender is running so it doesn't stick to the blades. You can also add protein powder if you want.