David Allen (b. 1945) — GTD Pioneer
A seminal voice in personal productivity, David Allen popularized Getting Things Done in the early 2000s, but his approach builds upon decades of work in organizational psychology and time management. GTD provides a disciplined method to externalize tasks and reduce cognitive load, enabling professionals to focus on the next action with clarity.
Real-world anchor: The GTD framework has been widely documented in case studies across industries—from IT services to legal firms. The 4-stage model and the 5-step processing cycle have been foundational for many modern productivity apps and templates.