Inevitably, I have my phone but forget my wallet. Or I have my wallet but forget my phone. For this reason, the Card Ninja is pretty awesome.
"This is one smartphone accessory that works for both iPhones and Androids. Just peel and stick the thin 2.55mm sleeve to the back of your phone and you have a secure pouch that can hold up to 8 cards or cash. Cheers to you, Card Ninja, for helping me be more efficient." -AM