As the freeway approaches 100% capacity, it ceases being a freeway. It becomes a parking lot.
High multitaskers optimize for capacity and not for throughput.
Personal Kanban is:          A productivity tool: limiting our WIP helps us accomplish more.          An efficiency tool: focusing on our value stream encourages us to find ways to do more while expending less effort.         An effectiveness tool: making our options explicit leads us to make informed decisions.
Plans are useless, but planning is indispensable. ~ Dwight D. Eisenhower