Have you read the book?

My suspicion is that over 90% of it's worth is in an additional rule, which isn't one of these: "commit to practising something for 20 hours before starting to apply these principles". My guess - 20 hours of dedicated practice is just way longer than people tend to think it is, and you'd be surprised how much you learn in 20 hours without making an effort to do any of the rest of the 10 things.