You've got to eat while you dream. You've got to deliver on short-range commitments while you develop a long-range strategy and vision and implement it. The success of doing both. Walking and chewing gum if you will. Getting it done in the short-range and delivering a long-range plan and executing on that.
I started out in engineering. I was a geophysical engineer. Throughout the course of my life I've done a lot of strange jobs and the effect has been to make me think a little more skeptically about our capitalist society.