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Put your business cards behind your badge, so you can easily trade with people. When you exchange cards, put their card in your badge. When you run out of cards, take all the cards you collected out, and put a fresh batch of your cards in. 
 
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Capture Date: 2012-09-26 08:35:40
Camera: Canon PowerShot A4000 IS
Image Size (w x h): 4608 x 3456
ISO Speed: 100
Shutter Speed: 1/60 sec
Aperture: f 3.0
Focal Length: 5.0 mm
2012_09_Conference_tips