You rotate your stock, so you always have fresh supplies that are perishable, like water, batteries, food, some medical items. At the same time, inspect everything else.
Otherwise, you'll get a big bag of "oh my gods, what is that?" when you really need it.
Some stock you really want to inspect monthly, if not weekly.
_________________________
-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.