Check out Flickr member Muzzlehatch‘s instructions for making a "light bouncer/diffuser for a camera-mounted external flash to use on macro shots". Here’s the first step, be sure to view all the steps in the MuzzBounce™ Ghetto Flash modifier set.
Via Strobist
I’m bookmarking your site… kudos for making it. And your work…. fantastic stuff! I am hoping to be this good someday.