With meat products, you can't always tell by the smell, and so it's best to observe the "Use By" dates as they could make you ill. Items past the "Best Before" are not likely to make you sick, but it's useful to know how old things are so you can rotate your stock of tinned and dry goods. Recently I found a tin of black-eyed beans that was well past its BB date, and decided to use it anyway. The beans had a horrid, fusty flavour, and spoiled the whole dish I was using them in. Honey, as someone says above, doesn't go off, although the texture may alter as the sugars crystallise, but honey producers are obliged to invent a Best Before date to go on the label. "Best Ignored", I would say!