The arrival of fall heralds the end of summer vacation for many of us. Whether it's back to work or back to school, the dog days of summer are over. No more freedom to do what you want, when you want. No more days of swimming at the pool, lazing on the beach, hanging with friends, or staying up late and being able to sleep in as long as you want. It's time to knuckle down to work, meet deadlines, sit through boring classes, do a whole bunch of homework, and study for tests. What kind of fall fun is that?