My girlfriend has IBS and I have Ulcerative Colitis...its pretty shitty *ROMSHIT*
Anyways...check out this website for a lot of helpful hints and recipes to help keep everything in check.
http://www.helpforibs.com/
Also I would like to recommend Aloe Vera Juice. Get that natural stuff. I have heard people with bowel problems drinking this stuff and almost being completely cured (if thats even possible).
And make sure its the natural stuff, not the processed stuff. I just got myself I alot yesterday and am starting to drink it today...I'm sure in about two months time I will see a huge difference in my bowels.