Over time, managers and executives began using statistics and analysis to forecast the future, relying on databases and spreadsheets in much the same… - Josh Kaufman

As to methods, there may be a million and then some, but principles are few. The man who grasps principles can successfully select his own methods. The man who tries methods, ignoring principles, is sure to have trouble. — RALPH WALDO EMERSON, ESSAYIST AND POET

Every successful business (1) creates or provides something of value that (2) other people want or need (3) at a price they’re willing to pay, in a way that (4) satisfies the purchaser’s needs and expectations and (5) provides the business sufficient revenue to make it worthwhile for the owners to continue operation.

Don’t go around saying the world owes you a living. The world owes you nothing — it was here first. — MARK TWAIN, GREAT AMERICAN NOVELIST