remission means living your life. so number one, don't obsess about the next flare (something I'm still learning to do five years in).
next, avoid binge anything as someone mentioned above-- don't go nuts with alcohol and sweets in particular. It stresses the colon lining, for whatever reasons.
eat healthy, live healthy, sleep well... take your meds religiously. if you want supplement suggestions, you can look at my signature.
Left-sided UC, Jun 2005. Flex-sig only... clear for first 20cms, then inflamed through next 30cms.
Pharmaceutical: Pentasa 3G/day, hydrocort 1x every 7 days
Probiotics: Acidophilus Pearls, Primadophilus Bifidus
Naturals: Caprylic Acid, Methylated B-12, Vit ACDE, Zinc (w/copper), Selenium, Turmeric, Bromelain, Luteolin
Killer Foods: Soda, Fried Food (especially french fries!), Beer, Red Wine, Pepperoncinis