I have such a bad hangover today. We drank until 1am last night to celebrate a good friend Ph.D. defense starting from 6pm...I really didn't sleep last night cause I was having a headache all night...woke up at 7am, took a shower and came to school at 8:30am...But I just can't concentrate. To make everything even worse, I can't find my Cornell card(student ID card) again! I lost it for the third time last week and now I can't find the new one again! they charge me $25 every time.