One of my all-time favorite diagrams from Jessica Hagy, who illustrates a wide range of mundane concepts and life lessons with charts and Venn diagrams.
Now that you know where the comfort zone is in relation to where the magic happens, here's more about getting out of that comfort zone (hint: just DO it):
You deserve to shine
Getting out of MY comfort zone
The funny thing about the comfort zone
Facing the unknown and surviving
7 ways to kickstart the creative process