Imagine if you could get twice as much work done by 5 p.m. every day.

For most people, improving productivity means more business growth, better health, less stress … and better odds of reaching those big, scary goals.

In this post, busy CEOs and founders of 14 fast-growing companies shared how they hack their productivity. Below you’ll find the No. 1 piece of advice from each entrepreneur on how to make the most of your hours at work.