S'organiser Pour Réussir / Getting Things Done

I'm curious about the process behind structuring these methods—were they based on personal experience, research, or a mix of both? Did any steps evolve through reader feedback?

I’ve tried similar systems before, but this one finally clicked for me. Am I the only one who felt a real difference in daily anxiety levels after adopting GTD?

The initial motivation is high, but keeping consistent can be tough. How have others managed to stick with the system over months or years?