Take all the business cards you have in your desk drawer and piled on your desk. Go through and shred those that are no longer valid and then decide on a system for the rest. Do you want to contact them and see if this is still their valid phone/e-mail? What do you have for a contact database system so you can enter the information and get rid of the card? How will you follow-up? When you answer these questions you have your Business Card System!