When it comes to women on boards, the National Association of Corporate Directors (NACD) has come a long way, Baby, to quote an old TV ad for the Virginia Slims. The first issue of NACD’s original newsletter, Director’s Monthly, featured a Board of the Month – first American Savings and Loan. The board’s photo shows 15 directors, all apparently white males. This kind of board composition was commonplace in the late 1970s, and NACD’s membership reflected this fact. Flash forward to the present day, when most boards have diversity and the picture looks as quaint as a TV ad for smokes. How can a board grow in diversity? Here is the story from NACD, expressed as lessons learned for boards and for the individuals who seek to join them.