I'm glad if going todo-less works for the author but I wouldn't recommend it. I doubt many people have the capacity to remember that meeting you're supposed to have Friday after next at 3:30 or that little bug someone just mentioned over the phone that you'll have to fix at some point when you're back at the office.

Like all things, you can go to far with todo lists. Todo today lists have never worked for me. But I'd be lost without a list of appointments and minor/forgettable actions (filed according to the context in which they need to be done).