Slate's Nadia Arumugam has an interesting take on those "Sell by" and "Enjoy by" labels on food:
There's a filet mignon in my fridge that expired four days ago, but it seems OK to me. I take a hesitant whiff and detect no putrid odor of rotting flesh, no oozing, fetid cow juice-just the full-bodied aroma of well-aged meat. A feast for one; I retrieve my frying pan. This is not an isolated experiment or a sad symptom of my radical frugality. With a spirit of teenage rebellion, I disavow any regard for expiration dates.
Via Boing Boing