Skip to main content40 Under 405 common mistakes to avoid before entering Ad Age 40 Under 40The final deadline for 2026 Ad Age 40 Under 40 is July 23, 2026, at 5 p.m. ET. (Contributed/Ad Age) June 15, 2026 05:00 AM EDTFeatured StoriesBrand MarketingWhere CMOs are finding AI success and what gaps remainA Boston Consulting Group survey found that 32% of CMOs are leaders in agentic marketing, but many are still learning to scale new processes.APByAdrianne PasquarelliCannes LionsCMO guide to Cannes: what to do—and avoid—at the ad industry’s biggest global event ESByE.J. SchultzAgenciesMcGarrah Jessee hires Jason Campbell as chief creative officerBBByBrian BonillaTop 5The top 5 creative campaigns to know about right nowTNByTim Nudd
5 common mistakes to avoid before entering Ad Age 40 Under 40
Avoid the most common 40 Under 40 entry mistakes with these clear, actionable tips on eligibility, publishable details, recent impact, results and role clarity.
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