Edward Tufte, an authority on analytic design and author of “The Visual Display of Quantitative Information,” talks to The Washington Post’s On Leadership editor, Lillian Cunningham, about realizing 95 percent of information is junk — and how that has sharpened his approach to any new field he pursues.

If you’re not doing something different, you’re not doing anything at all.

One of the great revelations when I was in graduate school and was overwhelmed by the literature was that after about six months I realized that the published literature was junk. That’s a tremendous revelation. That is: There’s only 5 percent you have to read. You just have to be able to identify it. That is: You have to have a sense of relevance, a sense of excellence. And that’s enormously economizing. The trick is to find what’s worth doing.

For the full video, go to www.washingtonpost.com/leadership.