Where did all the time go?

It seems like when I was a kid there was lots of time in the day, however, as an adult, I have to wonder just where all that time went. It seems like no sooner do I wake up than the day is passed and I a putting off going to bed to work on just a few more things I have to do. And yet, I look at the to-do list the next day and find myself putting the same things on it I had set for doing the day before. Where did the time go?