Things that I have heard that you shouldnt eat are:
Small goods- salami's etc. Soft Cheese- caembert etc. Food that was not cooked fresh (so if you go fast food make sure it is fresh), you should stop drinking alcohol for a while, cut down or out of coffee, you shouldnt have very much fish, but things like snapper are okay 1-2 times a week.

This is a start. Hopefully that helps.
I am sure the article will give you oodles more info though!