Zombie Cliché Lookout:
Characters often stumble upon items that initially appear to be of little value. Of course the audience always realize these things are going to play an important roll down the road, usually during some climactic event. This is fairly similar to Russian playwright Anton Chekhov’s rule about showing important items: “If in the first act you have hung a pistol on the wall, then in the following one it should be fired. Otherwise don’t put it there.” In other words, don’t bother showing something if it isn’t going to be important.
Of course, these items might turn out to be red herrings in the long run.