Don't be caught without your business card. You should have your cards with you everywhere you go. You never know when you are going to make that special connections with someone.
Sometimes I think I don't need my cards where I am going and inevitably I strike up a conversation with someone and go scrambling for a pen. Better safe than sorry so take you cards everywhere you go. You'll thank me later.
How has being in the right place at the right time helped your business? How could being prepared with your contact info on your business card help you next time?