If you spend most of your time at a keyboard, you can count yourself among the 60 million or so professionals known as “knowledge workers”—a term Peter Drucker coined in the 1960s to describe academics, tech people, analysts, essentially, anyone who didn’t work a physically demanding job. You know. People who “think” for a living. What a…

Carson Tate was working in sales when she realized there was a direct correlation between how organized she was and how much revenue she brought in. When her colleagues adopted her system and started earning more, she knew she was onto something. Carson saw that as her cue: She left her full-time job and launched her…