I really like that phrase. Looks like it has been used a little bit online:

In-House Corporate Workshops: Become CEO of Yourself

This personal mastery workshop will increase self awareness and help participants to take accountability for the development of their own careers…

And:

Becoming the CEO of … Yourself
When you can show that you are in control, empowered and responsible in your job, you will be given the opportunity to make a difference.

These references, of course, all seem to be connected to business. I’m also envisioning direct connections to what might be considered “occult” or spiritual traditions as well. Ruiz uses the Toltec concept of the mitote:

The mitote can be compared to a huge marketplace where thousands of people are talking at the same time, and nobody understands each other. This is the condition of the human mind - a big mitote, and with that big mitote we cannot see what we really are. In India they call the mitote maya, which means illusion. It is the personality’s notion of “I am.” We cannot see who we truly are; we cannot see that we are not free…. The mitote is the reason humans hardly know what they want, how they want it, or when they want it. They don’t agree with themselves because there are parts of the mind that want one thing, and other parts that want exactly the opposite.

If each person is also registered as a corporation for the purposes of licensing data content derived from their existence, then the idea that you would be your own CEO is no longer just a clever metaphor, either….