Lean Startup is also based on consistency, except that what you do is not defining the kind of task as such. What you do is to keep learning, listen to your use

Lean Startup is also based on consistency, except that what you do is not defining the kind of task as such. What you do is to keep learning, listen to your users and push the company into directions according to those insights. That's your One Task, even if it might encompass a lot of different subtasks. It's unlikely that this interpretation corresponds to what Jiro meant, since it essentially tells you to practice being an opportunist every day, rather than to practice a more narrowly defined occupation in greater depth. But it's one way to accept both pieces of advice without disagreeing with either :P