Billie Jean King (@BillieJeanKing) -- a 2009 recipient of Presidential Medal of Freedom, our nation’s highest civilian honor – is perhaps more responsible than any other individual for the gains in women’s and girls’ sports throughout the last 50 years. She has long been a pioneer for equality and social justice, founding the Women’s Sports Foundation and the Women’s Tennis Association, and defeating Bobby Riggs in the "Battle of the Sexes" tennis match.

King won 39 Grand Slam titles during her career, a statistic partially responsible for the National Tennis Center, home of the US Open, being renamed the USTA Billie Jean King National Tennis Center. She serves on the boards of the Women’s Sports Foundation, the Andy Roddick Foundation and the Elton John AIDS Foundation and is a member of the President’s Council on Fitness, Sports and Nutrition.

Here, Billie Jean likens an athlete's brain to a computer. When athletes make mistakes -- which she simply considers "feedback" on the activity -- she suggests they "enter" the data contained within that feedback and then "delete" the actual mistake. That way, minds are clear to implement the best response to the feedback when a similar situation next arises.