Zig Ziglar, the famed author and motivational speaker who's been pumping up salespeople, entrepreneurs and corporate employees for five decades, announced Tuesday that, at age 80, he's finally had enough.

FORBES: At 80, Zig Ziglar Decides To Slow Down

At 27 he discovered motivational speaker and evangelical Christian Hilary Hinton (Zig) Ziglar.

FORBES: Magazine Article