i use my gut (no pun intended!) instinct. i don't eat soft cheeses, sliced meats from the deli (but unusual to find one close to me where they slice it freshly - it's pretty much all pre-sliced) - unless hot, soft serve, oysters, pre-packaged salads.

but i do eat (piping hot) deli meats, salad in things like subway (if it's a high turnover place) and in the occasional burger. i have also continued to eat fish that may be high in mercury (although not more than once a week). i eat leftovers that i have cooked (or my mum) because i know how they were stored.

i think it's one of those things that it's hard to provide more than a guide to not eat certain things at all - by this i mean that care providers can't really say 'use your own intelligence not to eat anything completely silly', it's easier for them just to say we don't rec eating these foods at all. i hope that makes sense!