To take control of reality, we must first have the ability to control the self and before controlling the self, we must control the ego.
To put it simply, the taming of the ego can be reduced to this:
The ability for you to exercise control over your bodily desires, using the will of your mind.
The ability for you to direct your mind and exercise power over whatever the ego wants to do.
Anytime that you put the ego in a circumstance where it wants one thing, and you serve it what YOU want to serve it, that's control.