Shadowing Beane at the combine is a good start, but Miller needs a few more mentors:
Like Dave Gettleman, haranguing players over how many snacks they're taking. If you watch those pennies, the dollars saved will add up.
Like Bill O'Brien, why settle for just one role. Roll over the HC, and seize the power. POWER. POWER!
Like Buddy Nix, learn the skills to power napping, and being 'punk'd' by two bit radio personalities.
Like Jerry Jones: "I'm not only the GM...I'm the owner!"