Editor's note: Inc. asked eight entrepreneurs at the top of their game to track for one day (Tuesday, November 29, 2016) how they spent every single hour. Productivity expert and author Laura Vanderkam then weighed in on what they're doing right, what they may be doing wrong, and how you can apply their productivity skills to your life.

The new kid in the mattress industry, Casper became an overnight hit when it racked up $1 million in sales within its first month in business. Three years later, the company is finding new ways to keep the buzz going around its direct-to-consumer mattresses, sheets, and pillows, a task that falls to Luke Sherwin, 28, Casper's chief creative officer. As a founder of one of the hottest startups in America, Sherwin's day is all work--and very little of anything else.

6:00 a.m. Wake up--the E.U. jet-lag morning boost!

7:00 a.m. Walk to coffee in Prospect Heights, in Brooklyn, New York, with my fiancée.

Laura says: Walk it off.

Jet lag is rough. Physical activity (and exposure to light) is a quick way to reset the body clock. You might not feel like doing a workout the morning after you fly back from Europe, but you'll definitely thank yourself when you're functional later in the day. Luke's early-morning walk may be the reason he makes it all the way through a late dinner.

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8:00 a.m. On the Q train from 8 to 8:40. Get off at Union Square in Manhattan.

9:00 a.m. Have a 9 a.m. video call with European team regarding an agency partner for Germany. (Keep meetings short by having strict pre-agreed agenda.) Finish at 9:30. I catch up on emails, and then look at performance reports for the various aspects of the business.

10:00 a.m. Emails for an hour. I respond to all, but try to end conversations where decisions could be left hanging.

11:00 a.m. Brainstorming on voice-overs for our upcoming TV spot and iteration with our lead copywriter.

12:00 p.m. Catch up with our VP of communication and director of experiential over our twice-weekly lunch.

Laura says: Break bread.

Lunch is a great slot for recurring meetings. You have to eat anyway, but this way the meetings don't take up time that you could use for more focused work or brainstorming. Since recurring meetings don't have to earn their spot on your calendar, it's easy for them to lose effectiveness. But if you meet over a meal, well, it can always be bonding time if the agenda isn't completely on point.

1:00 p.m. Emails debating some creative for E.U. and whether it translates.

2:00 p.m. Meet with my team on our new product-detail-page design.

3:00 p.m. Catch up for my weekly with CMO and CEO to discuss how to produce more social videos.

4:00 p.m. Meet with our S.F. design team about a future product and the features that we'd explain via video.

5:00 p.m. Final emails and messing with voice-overs for our new TV spot.

6:00 p.m. Subway to our SoHo popup store to meet with our chief experience officer. We discuss how we can track customers as a specific cohort online.

7:00-10:00 p.m. Walk to a restaurant for dinner to celebrate three years of working with our branding agency, Red Antler.

11:00 p.m. Commute.