iPhone and iPad accessories from $6 to $200
Since the screen takes up half the iPhone, and the screen is made of glass, and glass breaks, a screen protector can mean the difference between a broken iPhone and an iPhone that lives to fight another day.
At only 0.3mm thin, the Anker screen protector doesn't add any bulk to the iPhone, but it does offer some extra protection against scratches, chips, and breakages.
Combine this with a heavy-duty case - such as the OtterBox Commuter (also listed here) - and you have all-round protection for your fragile iPhone.
Price: $6 | More info