Yup, he is very selective in his sample. He sampled a bunch of "super-achievers" and some of them don't use to-do lists. He didn't say how much or what qualifi

Yup, he is very selective in his sample. He sampled a bunch of "super-achievers" and some of them don't use to-do lists. He didn't say how much or what qualified as a to-do list. Then he ignores people who are successful and use to-do lists. There's also huge selection bias. What about all the disorganized people who don't use to-do lists and aren't successful? I can assure you there are a lot of them. To-do lists are probably very weakly correlated with success, if at all.