Something I found that has really helped me is hemp products. I never cook with much fat of any kind, but when I do use oil, I have found that cooking with hemp oil, and using it as a substitue anywhere I would've used butter or margarine, has really helped my GI function.
I'm not much of a meat eater, so I have also added hemp meal, and hemp hearts (or hemp seeds) to a lot of the foods that I eat for the added protein and for the omegas. These are good in soups, mixed into yogurt, salads, or pasta dishes. Hemp is a bit of an aquired taste. It has sort of a nutty flavor to it, but it is not a very strong flavor. Now that I'm used to it, I quite enjoy it. I believe you can find the products at most health food stores.
I have a severe fish allergy, so any of the fish-specific oils were not an option for me. Give the omegas a good try. I believe in their benefits.
"Be the change you wish to see in the world" - Ghandi