Every case is different. For me, when all else fails, a 40mg or 60mg regimen of prednisone usually calms things down. I'm lucky as I've always seemed to tolerate it well.
I've also recently become a believer in VSL#3...ask your doc to prescribe the prescription dose. Oh, and I try to limit bread, cereal and grains...stick to more meat, fish, fruits, and vegetables.
Are you on Rowasa enemas? I bought an inversion table so I can administer on my side, and then get on the table. Hanging upside down (follow the instructions for the table) really seems to work. It distributes the enema further into the colon (sometimes I take 2), and after 5 minutes or so, I simply walk to bed and it stays in all night.
Hope this helps at least a little bit. Good luck.