Let's face it. As soon as we take our new gadget from its box, it becomes exposed to wear, tear and scratches. Unless you don't care about signs of physical wear, though we think you should, there are several ways of to protect it out there. See the iPhone above? Yes, it's protected...
Following the design mantra of less is more, your best option would be to get the "clear shield" type of film. The "static cling" version is the best for easy application and you can barely see it once applied to the device. Power Support has a $19.99 package, that includes 2 front panels and 1 rear panel for the iPhone4. This company offer the best out there.
You can also buy the Amazon special $2.99 that almost looks the same.
Then you have the "wet" application, like the one offered by Zaag's Invisible Shield, which requires a spray a solution to be applied to your device in order to activate the glue on one side of the film (think tinted windows). A little bit more complicated, but worth the added protection in our opinion. This kind of films always have an small amount of orange peel look.
These kind of films are the best to minimize the visual impact and keep the design as it was intended from the manufacturer.
After that, you have the plastic/rubbery types that provide a great deal of protection at a price of disguising your device's design. The minimalist version would be the Apple Bumper, a solution iPhone users can receive for free thanks to Apple's program, to ones that covers all the back and sides like the ClearShield from Agent 18 that provides all of the protection with a barely there appearance. This slider cover showcases the sleek design of the iPhone 4, while shielding against the bumps and scrapes that life inevitably brings.
Then, the ultimate in protection: the Otter Box Defender Series, with the inner padding designed to isolate the device, to the textured silicone exterior for improved grip. It even includes a holster.
Whatever you decide to do with your device, don't leave home without protection. From almost nude to winter clothes, there's something for you.