Have you ever tried maing a to-do list, at work or otherwise? How many actually followed the list all the way to the end?
I often use it at work, and find it extremely useful. Especially on days when I have too many items on my plate and I can't focus on one thing without worrying about another at the back of my head. There are often days when I flit from one job to another, without giving each its due attention, wasting too much time switching, and end up tired, confused, and frustrated at the end of the day, not to mention very less productive.
Lists show the way to organize work and save the day!