Consolidate all those bonus cards

http://www.makezine.com/blog/archive/2007/01/consolidate_all.html

“I got sick and tired of having a dozen little “bonus” cards to carry around, so I made this simple fix. Basically, I just scanned in all my barcodes, fit them nicely into a row in photoshop and then printed them out onto a card. There are more detailed instructions that follow if you need them. This page shows the finished product.”

or just try this free online service that lets you type in the barcode numbers and automatically generates the card for you — http://www.justoneclubcard.com/