Just eat like you normally do. Relax! Just don't go eating three cans of tuna a day and you will be fine.
Not a lot of salty foods either
They also suggest that you eat everything fully cooked including meat and eggs, just incase there is bacteria. I still eat over easy eggs and have never had problems
Stay away from anything unpasteurized like Brie cheese , etc...also stay away from raw fish (sushi), raw oysters, and high mercury fish like swordfish, tuna, mackerel etc... You can have a caffeine but you shouldn't have too much, like one cup a day is just fine. Your pretty much okay to eat anything else you want and if there's some stuff I'm missing I'm sure other mommies will mention it. BTW congratulations!!