Banish the plain vanilla color casing of the Xbox 360 and replace it with a glossy black, shiny chrome, or transparent case.
Installation is relatively simple, the full instructions have been linked on NCSX, but be aware that opening your Xbox 360 will void your warranty. At a price of $49 for each replacement shell, the transparent case is the best deal as it includes a matching replacement joypad case for an additional look at the inside of your controller (including extra lights).