I never ate at food courts unless I knew they were cooking right there and then - like some of the asian places. Or McDonalds, sadly. Actually, I don't think I ate at a food court the whole time.

I avoided all sandwich bars, salad bars, sushi, bain marie food etc. Often the food in the bain marie is cooked and left from 10:30am and when you're having lunch at 1pm, it's been sitting slowly stewing bacteria for a couple of hours. Yuk.

Carry a small container of nuts with you. It's good to keep up the protein intake as well as taking care of the hunger.