1) Keep business cards handy- its amazing the times when you need a business card- just remember to make sure your cards are kept clean
2) Consider what information needs to be on business cards- ie in terms of social media- which are the most useful channels to communicate with you
3) Replace with a new card if there is a change of info on the old card. Do not scribble on a business card to replace the info.
4) Utilise your business card with a photo of yourself
5) Be aware of when you are nearly out of business cards