Principles are ways of successfully dealing with reality to get what you want out of life.
Ray Dalio, one of the world’s most successful investors and entrepreneurs, cites principles as his key to success.
Leverage in an organization is not unlike leverage in the markets; you're looking for ways to achieve more with less. At Bridgewater, I typically work at about 50:1 leverage, meaning that for every hour I spend with each person who works for me, they spend about fifty hours working to move the project along. At our sessions, we go over the vision and the deliverables, then they work on them, and then we review the work, and they move forward based on my feedback--and we do that over and over again. The people who work for me typically have similar relationships with those who work for them, though their ratios are typically between 10:1 and 20:1. I am always eager to find people who can do things nearly as well as (and ideally better than) I can so that I can maximize my output per hour.
Technology is another great tool for providing leverage. To make training as easy to leverage as possible, document the most common questions and answers through audio, video, or written guidelines, and then assign someone to organize them and incorporate them into a manual, which is updated on a regular basis.
Principles themselves are a form of leverage--they're a way to compound your understanding of situations so that you don't need to exert the same effort each time you encounter a problem.