Schedule your time throughout the day.

Narrow down the number of to-do list items.

Try to answer as many emails as you can in 30 minutes.

These are just a sampling of the plethora of productivity hacks out there, and at some point, you have to wonder if any successful people really use these tricks (or if they’re just keeping their real secrets to themselves).

Now, there’s an answer: The infographic below gives you five productivity tricks from ridiculously busy (and super successful) people, from a tennis legend to a former U.S. army captain. Keep reading to find out how they get everything done!

Infographic courtesy of American Express OPEN Forum. Photo of stopwatch courtesy of Shutterstock.