The best advice is probably to make sure you're drinking eight 8oz glasses of water a day, not to be counted as coffee, soda or sports drink intake either. I would add insoluble fiber too.
Sources of insoluble fiber: whole wheat, whole grains, wheat bran, corn bran, seeds, nuts, barley, couscous, brown rice, bulgur, zucchini, celery, broccoli, cabbage, onions, tomatoes, carrots, cucumbers, green beans, dark leafy vegetables, raisins, grapes, fruit, and root vegetable skins.
www.webmd.com/diet/fiber-health-benefits-11/insoluble-soluble-fiberBut its important to be careful with fiber, it can act like scrub brush among your already inflamed intestines, if you consume too much.