Getting Things Done - GTD

The Zeigarnik Effect and GTD
One day in 1927 Bluma Zeigarnik, a Russian student of psychology at the University of Berlin, went along with several classmates and teachers to have dinner at a restaurant in town. When the waiter who served them took the order of all the diners with absolutely nothing to write in, as he did with the rest of the tables, she thought it was going to end badly. However, after a while the waiter served everyone exactly what they ordered.