It's great advice for people who have the autonomy to set their own to-do lists. If you have other people you're working for, it's difficult to say, "I couldn't remember to do it so I don't think it was worth doing."

It reminds me a lot of Mark Cuban's advice of never having a set schedule or meeting times. Great idea in theory and when you get to Atwood's or Cuban's stature it's a lot more implementable.