In her new book, neuroscience researcher Mithu Storoni breaks down how to best structure your work sessions and increase your productivity. In an essay published in The Economist in 1955, British historian Cyril Northcote Parkinson noted how work often “expands so as to fill the time available for its completion.” Writing a few lines on a postcard, he observed, can take an entire day if one has the entire day to write it in.