How was your first day back to work/school? (for those of you who had the summer off)

I teach, and today was my first day back after a good two and a half months off. During the summer, I slept in and lived the life of Riley. This morning, I was to be out the door at 6:30 in the a.m. And do you think that I could get any sleep last night knowing that I had to get up at 5:30? I got a full hour sleep and, today, I am not any good to anyone. ;-)