From 43 Folders:
The Hipster PDA (Parietal Disgorgement Aid) is fully extensible system for coordinating incoming and outgoing data for any aspect of your life and work. It scales brilliantly, degrades gracefully, supports optional categories and "beaming," and is configurable to an unlimited number of options. Best of all, the Hipster PDA fits into your hip pocket and cost practically nothing to purchase and maintain.
Building your first Hipster PDA:
1. get a bunch of 3'c5" files cards
2. clip together with a binder clip
3. there is not step 3
Learn more about this from Folder 43, by clicking here.