Step 2: Quit Smoking.
if you don't smoke, I'm sure your friendly neighbourhood chain smoker will provide you with an empty.
Step 3: Removing the foil
Note: With some brands of cigarettes, you can skip this step as the foil is already facing shiny side in.
Step 4: Attach to the camera
Feel free to adjust the angle of the packet's lid, to differ the angle of the flash spread. Also, experiment with position of the box. Reversing the box may also help.
The more upright your flash unit is and the lower the ceiling is, the better the results.
Step 5: Results
I no way will this replace a $400 external flash unit, but it is improvment on what you already have using something that you can probably find on the floor the next time your at a pub.
more examples can be found at my flickr site.
Created by Dan and Andy