A person who makes plans for future activities or development, or a book/device used for organizing schedules and appointments.
From 'plan' (from Latin 'planus' meaning flat or level ground) + suffix '-er'. The concept evolved from architectural drawing on flat surfaces to any systematic preparation for future actions.
The bullet journal method, invented in 2013, revolutionized personal planning by combining the flexibility of blank notebooks with systematic organization, proving that sometimes the best innovations are elegant simplifications of complex systems.
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