If you’re looking to create a timeless sense of purpose and to shape the overall mission of your life, then you should use principles. Establishing a set of principles creates a compass to which you can refer whenever something is in doubt or you need to take a stand or evaluate any particular opportunity, behavior, or situation.
Here are some other techniques people use to access and maintain the zone:
Introducing a long delay between when you do the work and when it is shown to the world. Annie Ernaux writes about this in A Simple Passion, a memoir about how she becomes obsessed in a banal way with a man who is having an affair with her—the thought that others will read