two. It’s called a check-in, and in simple terms it’s a frequent, one-on-one conversation about near-term future work between a team leader and a team member. How frequent? Every week. These leaders understand that goals set at the beginning of the year have become irrelevant by the third week of the year, and that a year is not a marathon, planned out in detail long in advance, but is instead a series of fifty-two little sprints, each informed by the changing state of the world.