I'm a careless man I think I should write something here everyday to improve my written English. Today I get some unlucky, I lost my bus IC card (A card can pay bus tickets with some degree discount). I lost it when I was charging my account on a self-service machine. When finish the charging I just left my card there and gone. It's so careless, And it's the second time I made this mistake. Last time I came back and found it, this time I didn't have this lucky when I came back to look for my IC card. I should get a new one this weekend, but how can I avoid the third mistake?