Also, most business card orders provide you with a free black plastic carrying case. This works nicely. You can create four individual compartments in the plastic carrying case by using a stapler. Simply staple, in a single line, through the middle of the case, perpendicular to the fold. Now you have four compartments just perfect for smartmedia cards.
Heavy paper can add stiffness to the plastic case.
Finally, during a long photo shoot, extra AA batteries can be carried or stored in a very organized manner. Go to your local sporting goods store and pick up a fly fishing lure box. The one that is perfect is made by Plano Molding Company. Model 3448 is a perfect fit for carrying three sets of 4-AA batteries. When one set of batteries has expired, turn them the opposite way of the fully charged batteries.