Do you think my briefcase is big enough to put in all these stuff ?   Let me see . Laptop , flash disk , a ballpoint pen , a pencil , a notebook , a pair of glasses , cell phone , charger , moisture , notion , ... Oh , that is too much . You are not going to a business trip .   I guess I need all of them .   Actually , the company will provide you with all of these supplies . So , you can leave this very thick notebook at home .   I know . But it is my lucky charm . I carry it all the time . 