Categories Articles The productivity-guru author of ‘The 4-Hour Workweek’ keeps his phone on airplane mode 80% of the day Post author By crystalg Post date January 8, 2018 Business Insider Feedburner Tags '4Hour, 'The, Airplane, author, keeps, mode, Phone, productivityguru, Workweek ← ‘Fire and Fury’ publisher’s attorneys push back against Trump cease-and-desist letter → Sessions under fire from all sides