I know this disease is frustrating beyond words. It's hard not to keep searching for exactly what is causing the disease and what will cure it, but doing that can just make you more anxious and the disease worse. If there ever was a disease that makes people chase their tail (pun intended) this is it.
These are some things I've tried and am having success: the spinach and sunflower seed diet; a good probiotic, primadophilus reuteri (regular acidophillus was not sufficient) plus activia yogurt daily; metamucil fiber wafers; using a hydrocortisone enema.
Try keeping a journal of what you eat, if you're bleeding, etc. If you bleed only once every few days, there may be something you're doing the day before that you can change... something you eat, or some med, etc.
Most of all, try not to drive yourself crazy!
Potato... Female, 58, dx 11/07 mild left sided ulcerative colitis (50 cm)
asacol 3 3x a day, cortenema (generic) every third night
culturelle, benefiber wafers metamucil wafers, activia yogurt, spinach & sunflower diet, primadophilus reuteri, Centrum, Vitamin E 400 mg
omeprazole 2xday, oxazepam when needed, lomotil or ImodiumAD when needed
Yoga, meditation, The Work by Byron Katie, exercise at least 5 days a week