90/10 Principle and/or Rule
21 Aug 2023 4 minute read 0 comments VitalyTennant.com
The 90/10 Principle and… or Rule, either way is a method that truly makes a difference in all aspects of life.It actually was publicized and mainstreamed by Stephen R. Covey who was an educator, author, businessman, and keynote speaker. His most popu...