The central idea should be specific enough to focus the map but broad enough to allow meaningful branching. It sets the scope, so invest a moment to write it concisely and precisely. A good central idea guides what belongs on the map and what does not.
Steps to define it
Examples of framing
Avoid being too vague (e.g., “Work”) or too narrow (e.g., “Write intro paragraph”). If the central idea feels too broad, break it into sub-projects and create separate maps. If it’s too narrow, merge it into a larger context.
Refine as you go
It’s normal to tweak the central idea during early iterations. As branches fill out, you may find a clearer or more accurate central label. Renaming the center is a small step that can significantly improve clarity and focus.