This is what works for me. I also recommended some foods I really think are working for me well.
I feel these are the worst foods for me to eat, especially when sick:
Alcohol/Soda/Sugary drinks (laxative...alcohol actually burns me when I drink it)
Most candy/Gum...even "sugar free" since they have sugar alcohols that act as laxatives.
Granola (had a bad experience with this)
Table Sugar (I'd use honey instead)
Popcorn (seems like it could actually get stuck due to texture and cause blockage)
Dairy (Milk, butter, American Cheese...may be due to the lactose also)
Whole Nuts (texture issue, just seem too hard, crunchy and sharp...almond butter/cashew butter/peanut butter would be safer)
Orange Juice (too acidic, laxative effect for me)
Fast food & Junk Food (McDonalds, Potato Chips, etc)
Fried and Deep Fried Foods
Coffee (laxative effect for me)
Frozen Convenience Food (Hot pockets, Pot Pies, etc)
Some fruits are actually irritating (especially dried fruits, raisins, grapes, prunes...I think it is because they are concentrated in sugar very highly)
I avoid bread also but if you do eat bread dont buy ones with nuts/seeds/7 grain...probably too much roughage for the system.
These seem to be very safe for me:
Beverages
Water - probably should be drinking this anyway even if not sick
Dole Pineapple Juice - has no added sugar, can dilute to make it less sweet
Weak tea - I only drink Green Tea brewed for only 1-3 minutes anymore. Some other safe teas that are soothing are Chamomile, Peppermint, Ginger tea...especially Ginger.
Food
Well Ripened Bananas - safest fruit IMO...helps bowel movements also. Most Crohn's books I read always recommend well-ripened bananas heheh.
Hard Boiled Eggs - I know they have a lot of cholesterol, but the protein is great and I cant really eat grains so cereal is off limits for me for breakfast. Fried eggs are a little bit tougher to eat because of the grease.
Baked Fish - I prefer wild Alaskan salmon due to low mercury and high omega-3s.
Natural Peanut or Almond butter - if you can handle this you can get a lot of calories from it and they make really healthy kinds with omega-3s. Great on celery.
Blueberries - I prefer frozen, seems to help my digestion a lot. I'd recommend other berries but some have a lot of seeds...I do eat them sometimes but when sick something like blackberries might be hard to digest because they are fully loaded with seeds.
Frozen Fruit Mix - Lots on the market without added sugar...go for fruits like pineapple, mangoes, peaches, strawberries...great if you are craving something sweet.
Honey - I'm not saying eat this by the spoonfuls but if you need to sweeten something it seems to be less irritating than using table sugar or those sugar alcohols. I'd say Stevia as some other posters like it a lot but it is really bitter in some things...its okay on fruit I guess but I tried it in tea and it was really inferior to honey in terms of taste.
I don't eat any complex carbs, but when I did I thought these were the least irritating:
Baked potato
Steamed rice