Steve Heller uncovers some:
"Keep Calm and Carry On" is the most famous motivational poster, with "Tomorrow is the First Day of the Rest of Your Life" coming in at a close second. But back in the 1910s through the Depression-era 1930s, motivation was in its golden years. How did industrialists and business leaders get the most productivity out of their workers? Not through cost-of-living increases or profit sharing or unexpected bonuses—but through a barrage of motivational sayings.
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