There are busy entrepreneurs, and then there are people who live, eat, breath, and sleep work. They’re driven by a passion for getting the job done, and they are most happy when they’re being productive. In fact, a study from the University of Warwick found that happiness can make people up to 12% more productive.

Are the most effective, successful, and productive entrepreneurs killing it with their daily schedule because they’re happy, or is there something else driving them?

I recently sat down with serial entrepreneur Neil Patel, someone I consider to be one of the busiest, hardest-working people I know.

With multiple successful startups under his belt, like Kissmetrics and Crazy Egg (and a constant stream of new content on NeilPatel.c...