Multitasking

Elon Musk has three executive job titles, five kids, and is wildly ambitious. He officially clocks in no more than 15 hours at the office but has said he doesn't ever stop working. With this schedule, he still averages 6 hours of sleep a night.

He multitasks by sending emails while scanning invoices, holds meetings and takes care of business on his phone at the same time, and texts with his children on his lap.