Most of the dates you see on dairy, produce, etc. are sell by dates. I've eaten stuff way beyond the posted date and have not gotten sick or died. I sometimes wonder if producers of such products put short shelf life dates on things so you think they are bad, throw them out and buy new. OTOH, dates on things like mayonnaise, etc. I'm a little more picky about if they have been open sitting in my 'fridge.
If you want to maxamize the shelf life of eggs, buy them in the inclosed styrofoam, not the open air paper kind, or the ones with holes. Eggs are porous, as they age the membrain on the inner shell will thicken, and yes the flat yoke is the time to pitch it.
SAHM.. the smell of milk is not a good indicator of freshness because the neck of the milk bottle can always smell a little sour. If you want to know for sure if your milk is good, pour a little into a glass of warm water or coffee. If it clouds up, it's fine. If it separates with little beads of white, pitch it. Same with cream.