Until it went on sale last November, Microsoft's Zune was heralded as the first true iPod-killer. But with its overly aggressive copyright protection and the odd, self-imposed limits to its most innovative features (like built-in Wi-Fi), it has so far failed to make even a dent in the iPod's shiny white-and-chrome armor. It's likely the Zune will improve with version 2.0 and beyond, but until then, here are three easy Zune tune-ups to ease the pain of waiting for a better model.