Here's Elon Musk’s morning routine—and his top productivity tip

This weekend alone, Elon Musk's SpaceX is scheduled to launch two satellites. And that's just one company. He's also founder and CEO of Tesla and of Neuralink. It's safe to say Musk is a productive guy — and it starts with his morning routine.

After getting six hours of sleep, the first thing the billionaire does when he wakes up at 7 a.m. is address what he calls "critical emails" for half an hour.

He drinks coffee, but most mornings he's too busy for breakfast.

Next, the 45-year old entrepreneur and tech icon says goodbye to his five sons (from his first marriage) and sends them off to school.

Piggyback rides around the Opera House

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Then Musk has a shower and drives to work. His mornings there are usually spent in engineering and design discussions, he says.

This is Musk's daily routine, according to an interview with jobs website Glassdoor. The site recently ranked employees' favorite CEOs and Musk came in eight place with a 98 percent approval rating, blowing away the average CEO approval rating of 67 percent. (The ranking is based on voluntary, anonymous submissions on Glassdoor.)

"Focus on signal over noise. Don't waste time on stuff that doesn't actually make things better." -Elon Musk, CEO of SpaceX and Tesla

As Musk schedules the rest of his day, he has to relentlessly prioritize. And that's his productivity recommendation for others, too.

"Focus on signal over noise. Don't waste time on stuff that doesn't actually make things better," he says.

For Musk the "signal" is product development, to which he dedicates the majority of his attention, according to an interview with Y Combinator president, Sam Altman.

"I think a lot of people think I must spend a lot of time with media or on businessy things," says Musk. "But actually almost all my time, like 80 percent of it, is spent on engineering and design. Engineering and design, so it's developing next-generation product. That's 80 percent of it."

In his free time, Musk says he likes to watch movies, hang out with friends and play first-person shooters with his kids. ("First-person shooters" are a type of video game where the player sees through the perspective of the main character and fires weapons.)