I had read that abdominal massage can help relief some of the IBS symptoms. I have been trying it on my own before bed time and I have had some relief from cramping. I happened to stumble upon a useful web site that has a video showing how to do the proper massage and there is even a paragraph about how to do it to yourself. Here it is: http://www.altmedweb.com/nlspring04.html
Let me know if this has worked for you! Enjoy!