Read my full write-up of constructing the MintyBoost on Tested.com
While I would not consider myself an electronics guy, I am a solder guy and enjoy a good project. One of my favorite sources for such projects is Adafruit Industries and in particular I love their MintyBoost USB Charger, which is normally installed in an Altoids tin. I wanted to design a custom case with the ability to add an on/off switch AND store the USB cable inside.
Once again, if you would like your very own, the 3D print files are available on my Thingiverse page. Or if you would just like to buy one, it's up on my Shapeways store.