Hi Bradraz
I would suggest getting a planner (dayrunner type thing) that has a calendar with lots of room to write for each day. Record everything you eat and when you ate it. Also write down when you have bowel movements and what they were like. I know some people on here have mentioned that they rate their's on a scale of 1 to 5, solid to watery? I always write down my exercise for the day and how i felt as well. You can include as little or as much detail as you want, whatever works for you. I always put a post-it on the days when I feel particularly bad so I can look back and see if there was a pattern. It's how I determined that I can't drink OJ or eat too much meat.
It does require a bit of a commitment, but it's really worth it. Good luck with it!