If cost is not a concern for you, there are lots of additional tools that can help. Wedge pillows can definitely be more sturdy than a pile of pillows. However, avoid body pillow systems, or long candy cane-shaped pillows. These are advertised as a solution for side sleepers, but cause more problems and pain for many. Instead, sleep on your good arm and stack pillows around yourself to keep you from flipping onto your other side unconsciously in the night.