I make smoothies all the time. Since I am alone I use what is called a "Magic Bullet". This works great. I highly recommend this item. If I am in a rush I can just take it with me to drink on the road.
You can begin with yogurt or just use fruits like bananas, strawberries, blueberries, blackberries etc.
I sometimes add ground flaxseed, or products from Sunridere or Global Light Networks. These products add more fiber to the smoothies