For those of us with larger music and video libraries, picking and choosing what media to put on our iPods, iPhones, and iPads can be a real chore. Luckily, iTunes has a built-in feature that can help you make customized playlists of just the stuff you want to hear and watch. Called Smart Playlists, these dynamic lists are created by setting different rules—say, only songs added in the last two years with a rating of four stars or higher—and…
