* soda, snack bars, candy, baked sweets
* mayonnaise, most salad dressings, barbecue sauces, most crackers, most breads, most potato chips
* fried foods (fries, fried chicken, fish sticks, chicken tendies, onion rings)
* refined white flour foods (pizza, white bread, most pasta, pretzels, flour tortillas, breakfast cereals, bagels)
* most milks and milk-based products (soft cheeses, butter)
* grain-fed meats, processed meats (bacon, hot dogs, bologna, sausage, jerky)
* chronic intake of alcoholic beverages
* doughnuts, cookies, muffins, frosting
While this list might seem excessive and it is by no means exhaustive or applicable or every person suffering from chronic inflammation, I'm sure you can speak from personal experience that several items on these lists have caused you some manner of discomfort.
There are so many substitutions available in every large grocery store and substituting fractions of every meal can go a long way. It's tough to get into the habit of regularly purchasing (for example) a variety of fruits and vegetables but it is definitely worth it.
For many of the items in the lists above, there are plenty of low-inflammatory options (eg: switching to whole grain breads instead of refined white flour breads, having dark leafy greens instead of Caesar salad, adding almonds, swapping in skim milk and yogurt from regular full-fat milk, any of the berries).
EDIT: removed coffee