Learn by doing. Not sure if you can break into the pharmaceutical industry? Spend six months interning at Pfizer making connections and see what happens. Curious whether marketing or product development is a better fit than what you currently do? If you work in a company where those functions exist, offer to help out for free. Whatever the situation, actions, not plan, generate lessons that help you test your hypotheses against reality. Actions help you discover where you want to go and how to get there.
Reid Hoffman and Ben Casnocha, The Startup of You