If it contains wheat, don’t eat it. Easy rule. Just read all labels.
There are alternatives like rice bread, almond crackers etc. but these aren’t always “perfect” foods, but a step in the right direction.
If you need more of a “diet” I’d suggest the 100 Gram Carb Cure for a month or two, then look into <a href="http://www.t-nation.com/store/products/indigo-3g"target=“new”>Indigo-3G.
Here’s the Carb Cure: http://www.t-nation.com/free_online_article/most_recent/one_hundred_gram_carb_cure
Here’s where my no-wheat rule comes from, a summary at least: http://thehealingproject.us/2012/09/22/book-summary-wheat-belly-by-william-davis-md/