You've probably seen some of those stick-on phone pouches at your local department store. It's a very simple idea: a little nylon pocket with glue on one side, intended to stick to your smartphone and carry credit/ID cards. I've tried several in a never-ending quest to banish my wallet, but they were all cheap, with poor glue and easily-torn material. Then I chanced $12.99 on the Sinji Pouch.
This little guy has changed my daily routine for the better.