Never meat or dairy - those saying milk etc (and yes... Cheesecake...) it's really not a good idea, you can give yourself an off stomach with dairy that has turned very slightly but still smells/tastes fine. Probably not going to do any damage but you might end up feeling pretty nauseous for a day and spending some time on the toilet
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Things like bread are fine unless they're mouldy... And you'll know about it if there's even the slightest hint of mould because the taste is strong and obvious so you probably would neven swallow it. "Stale" bread (gone a bit hard) is fine if there's no mould, might not be appetising but is usually fine as toast.